20895420

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1$

素因数の和:164

約数の個数: 192

約数和(自身を含む): 74511360

約数和(自身を除く): 53615940

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 13, 14, 15, 20, 21, 26, 28, 30, 35, 39, 42, 43, 52, 60, 65, 70, 78, 84, 86, 89, 91, 105, 129, 130, 140, 156, 172, 178, 182, 195, 210, 215, 258, 260, 267, 273, 301, 356, 364, 390, 420, 430, 445, 455, 516, 534, 546, 559, 602, 623, 645, 780, 860, 890, 903, 910, 1068, 1092, 1118, 1157, 1204, 1246, 1290, 1335, 1365, 1505, 1677, 1780, 1806, 1820, 1869, 2236, 2314, 2492, 2580, 2670, 2730, 2795, 3010, 3115, 3354, 3471, 3612, 3738, 3827, 3913, 4515, 4628, 5340, 5460, 5590, 5785, 6020, 6230, 6708, 6942, 7476, 7654, 7826, 8099, 8385, 9030, 9345, 11180, 11481, 11570, 11739, 12460, 13884, 15308, 15652, 16198, 16770, 17355, 18060, 18690, 19135, 19565, 22962, 23140, 23478, 24297, 26789, 32396, 33540, 34710, 37380, 38270, 39130, 40495, 45924, 46956, 48594, 49751, 53578, 57405, 58695, 69420, 76540, 78260, 80367, 80990, 97188, 99502, 107156, 114810, 117390, 121485, 133945, 149253, 160734, 161980, 199004, 229620, 234780, 242970, 248755, 267890, 298506, 321468, 348257, 401835, 485940, 497510, 535780, 597012, 696514, 746265, 803670, 995020, 1044771, 1393028, 1492530, 1607340, 1741285, 2089542, 2985060, 3482570, 4179084, 5223855, 6965140, 10447710, 20895420]

約数ペア:

[(1, 20895420), (2, 10447710), (3, 6965140), (4, 5223855), (5, 4179084), (6, 3482570), (7, 2985060), (10, 2089542), (12, 1741285), (13, 1607340), (14, 1492530), (15, 1393028), (20, 1044771), (21, 995020), (26, 803670), (28, 746265), (30, 696514), (35, 597012), (39, 535780), (42, 497510), (43, 485940), (52, 401835), (60, 348257), (65, 321468), (70, 298506), (78, 267890), (84, 248755), (86, 242970), (89, 234780), (91, 229620), (105, 199004), (129, 161980), (130, 160734), (140, 149253), (156, 133945), (172, 121485), (178, 117390), (182, 114810), (195, 107156), (210, 99502), (215, 97188), (258, 80990), (260, 80367), (267, 78260), (273, 76540), (301, 69420), (356, 58695), (364, 57405), (390, 53578), (420, 49751), (430, 48594), (445, 46956), (455, 45924), (516, 40495), (534, 39130), (546, 38270), (559, 37380), (602, 34710), (623, 33540), (645, 32396), (780, 26789), (860, 24297), (890, 23478), (903, 23140), (910, 22962), (1068, 19565), (1092, 19135), (1118, 18690), (1157, 18060), (1204, 17355), (1246, 16770), (1290, 16198), (1335, 15652), (1365, 15308), (1505, 13884), (1677, 12460), (1780, 11739), (1806, 11570), (1820, 11481), (1869, 11180), (2236, 9345), (2314, 9030), (2492, 8385), (2580, 8099), (2670, 7826), (2730, 7654), (2795, 7476), (3010, 6942), (3115, 6708), (3354, 6230), (3471, 6020), (3612, 5785), (3738, 5590), (3827, 5460), (3913, 5340), (4515, 4628)]