78420920

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{71}}^1\times {\mathrm{521}}^1$

素因数の和:656

約数の個数: 64

約数和(自身を含む): 182658240

約数和(自身を除く): 104237320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 71, 106, 142, 212, 265, 284, 355, 424, 521, 530, 568, 710, 1042, 1060, 1420, 2084, 2120, 2605, 2840, 3763, 4168, 5210, 7526, 10420, 15052, 18815, 20840, 27613, 30104, 36991, 37630, 55226, 73982, 75260, 110452, 138065, 147964, 150520, 184955, 220904, 276130, 295928, 369910, 552260, 739820, 1104520, 1479640, 1960523, 3921046, 7842092, 9802615, 15684184, 19605230, 39210460, 78420920]

約数ペア:

[(1, 78420920), (2, 39210460), (4, 19605230), (5, 15684184), (8, 9802615), (10, 7842092), (20, 3921046), (40, 1960523), (53, 1479640), (71, 1104520), (106, 739820), (142, 552260), (212, 369910), (265, 295928), (284, 276130), (355, 220904), (424, 184955), (521, 150520), (530, 147964), (568, 138065), (710, 110452), (1042, 75260), (1060, 73982), (1420, 55226), (2084, 37630), (2120, 36991), (2605, 30104), (2840, 27613), (3763, 20840), (4168, 18815), (5210, 15052), (7526, 10420)]