19854640

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1123}}^1$

素因数の和:1166

約数の個数: 80

約数和(自身を含む): 52684128

約数和(自身を除く): 32829488

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 17, 20, 26, 34, 40, 52, 65, 68, 80, 85, 104, 130, 136, 170, 208, 221, 260, 272, 340, 442, 520, 680, 884, 1040, 1105, 1123, 1360, 1768, 2210, 2246, 3536, 4420, 4492, 5615, 8840, 8984, 11230, 14599, 17680, 17968, 19091, 22460, 29198, 38182, 44920, 58396, 72995, 76364, 89840, 95455, 116792, 145990, 152728, 190910, 233584, 248183, 291980, 305456, 381820, 496366, 583960, 763640, 992732, 1167920, 1240915, 1527280, 1985464, 2481830, 3970928, 4963660, 9927320, 19854640]

約数ペア:

[(1, 19854640), (2, 9927320), (4, 4963660), (5, 3970928), (8, 2481830), (10, 1985464), (13, 1527280), (16, 1240915), (17, 1167920), (20, 992732), (26, 763640), (34, 583960), (40, 496366), (52, 381820), (65, 305456), (68, 291980), (80, 248183), (85, 233584), (104, 190910), (130, 152728), (136, 145990), (170, 116792), (208, 95455), (221, 89840), (260, 76364), (272, 72995), (340, 58396), (442, 44920), (520, 38182), (680, 29198), (884, 22460), (1040, 19091), (1105, 17968), (1123, 17680), (1360, 14599), (1768, 11230), (2210, 8984), (2246, 8840), (3536, 5615), (4420, 4492)]