21086520

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{1931}}^1$

素因数の和:1965

約数の個数: 128

約数和(自身を含む): 77898240

約数和(自身を除く): 56811720

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 13, 14, 15, 20, 21, 24, 26, 28, 30, 35, 39, 40, 42, 52, 56, 60, 65, 70, 78, 84, 91, 104, 105, 120, 130, 140, 156, 168, 182, 195, 210, 260, 273, 280, 312, 364, 390, 420, 455, 520, 546, 728, 780, 840, 910, 1092, 1365, 1560, 1820, 1931, 2184, 2730, 3640, 3862, 5460, 5793, 7724, 9655, 10920, 11586, 13517, 15448, 19310, 23172, 25103, 27034, 28965, 38620, 40551, 46344, 50206, 54068, 57930, 67585, 75309, 77240, 81102, 100412, 108136, 115860, 125515, 135170, 150618, 162204, 175721, 200824, 202755, 231720, 251030, 270340, 301236, 324408, 351442, 376545, 405510, 502060, 527163, 540680, 602472, 702884, 753090, 811020, 878605, 1004120, 1054326, 1405768, 1506180, 1622040, 1757210, 2108652, 2635815, 3012360, 3514420, 4217304, 5271630, 7028840, 10543260, 21086520]

約数ペア:

[(1, 21086520), (2, 10543260), (3, 7028840), (4, 5271630), (5, 4217304), (6, 3514420), (7, 3012360), (8, 2635815), (10, 2108652), (12, 1757210), (13, 1622040), (14, 1506180), (15, 1405768), (20, 1054326), (21, 1004120), (24, 878605), (26, 811020), (28, 753090), (30, 702884), (35, 602472), (39, 540680), (40, 527163), (42, 502060), (52, 405510), (56, 376545), (60, 351442), (65, 324408), (70, 301236), (78, 270340), (84, 251030), (91, 231720), (104, 202755), (105, 200824), (120, 175721), (130, 162204), (140, 150618), (156, 135170), (168, 125515), (182, 115860), (195, 108136), (210, 100412), (260, 81102), (273, 77240), (280, 75309), (312, 67585), (364, 57930), (390, 54068), (420, 50206), (455, 46344), (520, 40551), (546, 38620), (728, 28965), (780, 27034), (840, 25103), (910, 23172), (1092, 19310), (1365, 15448), (1560, 13517), (1820, 11586), (1931, 10920), (2184, 9655), (2730, 7724), (3640, 5793), (3862, 5460)]