638512940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{34589}}^1$

素因数の和:34682

約数の個数: 48

約数和(自身を含む): 1464402240

約数和(自身を除く): 825889300

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 71, 130, 142, 260, 284, 355, 710, 923, 1420, 1846, 3692, 4615, 9230, 18460, 34589, 69178, 138356, 172945, 345890, 449657, 691780, 899314, 1798628, 2248285, 2455819, 4496570, 4911638, 8993140, 9823276, 12279095, 24558190, 31925647, 49116380, 63851294, 127702588, 159628235, 319256470, 638512940]

約数ペア:

[(1, 638512940), (2, 319256470), (4, 159628235), (5, 127702588), (10, 63851294), (13, 49116380), (20, 31925647), (26, 24558190), (52, 12279095), (65, 9823276), (71, 8993140), (130, 4911638), (142, 4496570), (260, 2455819), (284, 2248285), (355, 1798628), (710, 899314), (923, 691780), (1420, 449657), (1846, 345890), (3692, 172945), (4615, 138356), (9230, 69178), (18460, 34589)]