31691920

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{983}}^1$

素因数の和:1040

約数の個数: 80

約数和(自身を含む): 81994752

約数和(自身を除く): 50302832

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 40, 52, 62, 65, 80, 104, 124, 130, 155, 208, 248, 260, 310, 403, 496, 520, 620, 806, 983, 1040, 1240, 1612, 1966, 2015, 2480, 3224, 3932, 4030, 4915, 6448, 7864, 8060, 9830, 12779, 15728, 16120, 19660, 25558, 30473, 32240, 39320, 51116, 60946, 63895, 78640, 102232, 121892, 127790, 152365, 204464, 243784, 255580, 304730, 396149, 487568, 511160, 609460, 792298, 1022320, 1218920, 1584596, 1980745, 2437840, 3169192, 3961490, 6338384, 7922980, 15845960, 31691920]

約数ペア:

[(1, 31691920), (2, 15845960), (4, 7922980), (5, 6338384), (8, 3961490), (10, 3169192), (13, 2437840), (16, 1980745), (20, 1584596), (26, 1218920), (31, 1022320), (40, 792298), (52, 609460), (62, 511160), (65, 487568), (80, 396149), (104, 304730), (124, 255580), (130, 243784), (155, 204464), (208, 152365), (248, 127790), (260, 121892), (310, 102232), (403, 78640), (496, 63895), (520, 60946), (620, 51116), (806, 39320), (983, 32240), (1040, 30473), (1240, 25558), (1612, 19660), (1966, 16120), (2015, 15728), (2480, 12779), (3224, 9830), (3932, 8060), (4030, 7864), (4915, 6448)]