20664280

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{811}}^1$

素因数の和:849

約数の個数: 96

約数和(自身を含む): 58317840

約数和(自身を除く): 37653560

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 40, 49, 52, 56, 65, 70, 91, 98, 104, 130, 140, 182, 196, 245, 260, 280, 364, 392, 455, 490, 520, 637, 728, 811, 910, 980, 1274, 1622, 1820, 1960, 2548, 3185, 3244, 3640, 4055, 5096, 5677, 6370, 6488, 8110, 10543, 11354, 12740, 16220, 21086, 22708, 25480, 28385, 32440, 39739, 42172, 45416, 52715, 56770, 73801, 79478, 84344, 105430, 113540, 147602, 158956, 198695, 210860, 227080, 295204, 317912, 369005, 397390, 421720, 516607, 590408, 738010, 794780, 1033214, 1476020, 1589560, 2066428, 2583035, 2952040, 4132856, 5166070, 10332140, 20664280]

約数ペア:

[(1, 20664280), (2, 10332140), (4, 5166070), (5, 4132856), (7, 2952040), (8, 2583035), (10, 2066428), (13, 1589560), (14, 1476020), (20, 1033214), (26, 794780), (28, 738010), (35, 590408), (40, 516607), (49, 421720), (52, 397390), (56, 369005), (65, 317912), (70, 295204), (91, 227080), (98, 210860), (104, 198695), (130, 158956), (140, 147602), (182, 113540), (196, 105430), (245, 84344), (260, 79478), (280, 73801), (364, 56770), (392, 52715), (455, 45416), (490, 42172), (520, 39739), (637, 32440), (728, 28385), (811, 25480), (910, 22708), (980, 21086), (1274, 16220), (1622, 12740), (1820, 11354), (1960, 10543), (2548, 8110), (3185, 6488), (3244, 6370), (3640, 5677), (4055, 5096)]