81505480

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{17123}}^1$

素因数の和:17158

約数の個数: 64

約数和(自身を含む): 221927040

約数和(自身を除く): 140421560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 17, 20, 28, 34, 35, 40, 56, 68, 70, 85, 119, 136, 140, 170, 238, 280, 340, 476, 595, 680, 952, 1190, 2380, 4760, 17123, 34246, 68492, 85615, 119861, 136984, 171230, 239722, 291091, 342460, 479444, 582182, 599305, 684920, 958888, 1164364, 1198610, 1455455, 2037637, 2328728, 2397220, 2910910, 4075274, 4794440, 5821820, 8150548, 10188185, 11643640, 16301096, 20376370, 40752740, 81505480]

約数ペア:

[(1, 81505480), (2, 40752740), (4, 20376370), (5, 16301096), (7, 11643640), (8, 10188185), (10, 8150548), (14, 5821820), (17, 4794440), (20, 4075274), (28, 2910910), (34, 2397220), (35, 2328728), (40, 2037637), (56, 1455455), (68, 1198610), (70, 1164364), (85, 958888), (119, 684920), (136, 599305), (140, 582182), (170, 479444), (238, 342460), (280, 291091), (340, 239722), (476, 171230), (595, 136984), (680, 119861), (952, 85615), (1190, 68492), (2380, 34246), (4760, 17123)]