640319880

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{4003}}^1$

素因数の和:4091

約数の個数: 128

約数和(自身を含む): 2029547520

約数和(自身を除く): 1389227640

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 31, 40, 43, 60, 62, 86, 93, 120, 124, 129, 155, 172, 186, 215, 248, 258, 310, 344, 372, 430, 465, 516, 620, 645, 744, 860, 930, 1032, 1240, 1290, 1333, 1720, 1860, 2580, 2666, 3720, 3999, 4003, 5160, 5332, 6665, 7998, 8006, 10664, 12009, 13330, 15996, 16012, 19995, 20015, 24018, 26660, 31992, 32024, 39990, 40030, 48036, 53320, 60045, 79980, 80060, 96072, 120090, 124093, 159960, 160120, 172129, 240180, 248186, 344258, 372279, 480360, 496372, 516387, 620465, 688516, 744558, 860645, 992744, 1032774, 1240930, 1377032, 1489116, 1721290, 1861395, 2065548, 2481860, 2581935, 2978232, 3442580, 3722790, 4131096, 4963720, 5163870, 5335999, 6885160, 7445580, 10327740, 10671998, 14891160, 16007997, 20655480, 21343996, 26679995, 32015994, 42687992, 53359990, 64031988, 80039985, 106719980, 128063976, 160079970, 213439960, 320159940, 640319880]

約数ペア:

[(1, 640319880), (2, 320159940), (3, 213439960), (4, 160079970), (5, 128063976), (6, 106719980), (8, 80039985), (10, 64031988), (12, 53359990), (15, 42687992), (20, 32015994), (24, 26679995), (30, 21343996), (31, 20655480), (40, 16007997), (43, 14891160), (60, 10671998), (62, 10327740), (86, 7445580), (93, 6885160), (120, 5335999), (124, 5163870), (129, 4963720), (155, 4131096), (172, 3722790), (186, 3442580), (215, 2978232), (248, 2581935), (258, 2481860), (310, 2065548), (344, 1861395), (372, 1721290), (430, 1489116), (465, 1377032), (516, 1240930), (620, 1032774), (645, 992744), (744, 860645), (860, 744558), (930, 688516), (1032, 620465), (1240, 516387), (1290, 496372), (1333, 480360), (1720, 372279), (1860, 344258), (2580, 248186), (2666, 240180), (3720, 172129), (3999, 160120), (4003, 159960), (5160, 124093), (5332, 120090), (6665, 96072), (7998, 80060), (8006, 79980), (10664, 60045), (12009, 53320), (13330, 48036), (15996, 40030), (16012, 39990), (19995, 32024), (20015, 31992), (24018, 26660)]