128567920

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{181}}^1\times {\mathrm{683}}^1$

素因数の和:890

約数の個数: 80

約数和(自身を含む): 324166752

約数和(自身を除く): 195598832

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 181, 208, 260, 362, 520, 683, 724, 905, 1040, 1366, 1448, 1810, 2353, 2732, 2896, 3415, 3620, 4706, 5464, 6830, 7240, 8879, 9412, 10928, 11765, 13660, 14480, 17758, 18824, 23530, 27320, 35516, 37648, 44395, 47060, 54640, 71032, 88790, 94120, 123623, 142064, 177580, 188240, 247246, 355160, 494492, 618115, 710320, 988984, 1236230, 1607099, 1977968, 2472460, 3214198, 4944920, 6428396, 8035495, 9889840, 12856792, 16070990, 25713584, 32141980, 64283960, 128567920]

約数ペア:

[(1, 128567920), (2, 64283960), (4, 32141980), (5, 25713584), (8, 16070990), (10, 12856792), (13, 9889840), (16, 8035495), (20, 6428396), (26, 4944920), (40, 3214198), (52, 2472460), (65, 1977968), (80, 1607099), (104, 1236230), (130, 988984), (181, 710320), (208, 618115), (260, 494492), (362, 355160), (520, 247246), (683, 188240), (724, 177580), (905, 142064), (1040, 123623), (1366, 94120), (1448, 88790), (1810, 71032), (2353, 54640), (2732, 47060), (2896, 44395), (3415, 37648), (3620, 35516), (4706, 27320), (5464, 23530), (6830, 18824), (7240, 17758), (8879, 14480), (9412, 13660), (10928, 11765)]