8130920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{409}}^1$

素因数の和:498

約数の個数: 64

約数和(自身を含む): 21254400

約数和(自身を除く): 13123480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 71, 140, 142, 280, 284, 355, 409, 497, 568, 710, 818, 994, 1420, 1636, 1988, 2045, 2485, 2840, 2863, 3272, 3976, 4090, 4970, 5726, 8180, 9940, 11452, 14315, 16360, 19880, 22904, 28630, 29039, 57260, 58078, 114520, 116156, 145195, 203273, 232312, 290390, 406546, 580780, 813092, 1016365, 1161560, 1626184, 2032730, 4065460, 8130920]

約数ペア:

[(1, 8130920), (2, 4065460), (4, 2032730), (5, 1626184), (7, 1161560), (8, 1016365), (10, 813092), (14, 580780), (20, 406546), (28, 290390), (35, 232312), (40, 203273), (56, 145195), (70, 116156), (71, 114520), (140, 58078), (142, 57260), (280, 29039), (284, 28630), (355, 22904), (409, 19880), (497, 16360), (568, 14315), (710, 11452), (818, 9940), (994, 8180), (1420, 5726), (1636, 4970), (1988, 4090), (2045, 3976), (2485, 3272), (2840, 2863)]