287999920

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{8933}}^1$

素因数の和:8990

約数の個数: 80

約数和(自身を含む): 744452352

約数和(自身を除く): 456452432

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, 1040, 1240, 1612, 2015, 2480, 3224, 4030, 6448, 8060, 8933, 16120, 17866, 32240, 35732, 44665, 71464, 89330, 116129, 142928, 178660, 232258, 276923, 357320, 464516, 553846, 580645, 714640, 929032, 1107692, 1161290, 1384615, 1858064, 2215384, 2322580, 2769230, 3599999, 4430768, 4645160, 5538460, 7199998, 9290320, 11076920, 14399996, 17999995, 22153840, 28799992, 35999990, 57599984, 71999980, 143999960, 287999920]

約数ペア:

[(1, 287999920), (2, 143999960), (4, 71999980), (5, 57599984), (8, 35999990), (10, 28799992), (13, 22153840), (16, 17999995), (20, 14399996), (26, 11076920), (31, 9290320), (40, 7199998), (52, 5538460), (62, 4645160), (65, 4430768), (80, 3599999), (104, 2769230), (124, 2322580), (130, 2215384), (155, 1858064), (208, 1384615), (248, 1161290), (260, 1107692), (310, 929032), (403, 714640), (496, 580645), (520, 553846), (620, 464516), (806, 357320), (1040, 276923), (1240, 232258), (1612, 178660), (2015, 142928), (2480, 116129), (3224, 89330), (4030, 71464), (6448, 44665), (8060, 35732), (8933, 32240), (16120, 17866)]