20671140

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{79}}^1\times {\mathrm{89}}^1$

素因数の和:194

約数の個数: 144

約数和(自身を含む): 68947200

約数和(自身を除く): 48276060

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 79, 84, 89, 98, 105, 140, 147, 158, 178, 196, 210, 237, 245, 267, 294, 316, 356, 395, 420, 445, 474, 490, 534, 553, 588, 623, 735, 790, 890, 948, 980, 1068, 1106, 1185, 1246, 1335, 1470, 1580, 1659, 1780, 1869, 2212, 2370, 2492, 2670, 2765, 2940, 3115, 3318, 3738, 3871, 4361, 4740, 5340, 5530, 6230, 6636, 7031, 7476, 7742, 8295, 8722, 9345, 11060, 11613, 12460, 13083, 14062, 15484, 16590, 17444, 18690, 19355, 21093, 21805, 23226, 26166, 28124, 33180, 35155, 37380, 38710, 42186, 43610, 46452, 49217, 52332, 58065, 65415, 70310, 77420, 84372, 87220, 98434, 105465, 116130, 130830, 140620, 147651, 196868, 210930, 232260, 246085, 261660, 295302, 344519, 421860, 492170, 590604, 689038, 738255, 984340, 1033557, 1378076, 1476510, 1722595, 2067114, 2953020, 3445190, 4134228, 5167785, 6890380, 10335570, 20671140]

約数ペア:

[(1, 20671140), (2, 10335570), (3, 6890380), (4, 5167785), (5, 4134228), (6, 3445190), (7, 2953020), (10, 2067114), (12, 1722595), (14, 1476510), (15, 1378076), (20, 1033557), (21, 984340), (28, 738255), (30, 689038), (35, 590604), (42, 492170), (49, 421860), (60, 344519), (70, 295302), (79, 261660), (84, 246085), (89, 232260), (98, 210930), (105, 196868), (140, 147651), (147, 140620), (158, 130830), (178, 116130), (196, 105465), (210, 98434), (237, 87220), (245, 84372), (267, 77420), (294, 70310), (316, 65415), (356, 58065), (395, 52332), (420, 49217), (445, 46452), (474, 43610), (490, 42186), (534, 38710), (553, 37380), (588, 35155), (623, 33180), (735, 28124), (790, 26166), (890, 23226), (948, 21805), (980, 21093), (1068, 19355), (1106, 18690), (1185, 17444), (1246, 16590), (1335, 15484), (1470, 14062), (1580, 13083), (1659, 12460), (1780, 11613), (1869, 11060), (2212, 9345), (2370, 8722), (2492, 8295), (2670, 7742), (2765, 7476), (2940, 7031), (3115, 6636), (3318, 6230), (3738, 5530), (3871, 5340), (4361, 4740)]