68420920

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{239}}^1\times {\mathrm{421}}^1$

素因数の和:688

約数の個数: 64

約数和(自身を含む): 164073600

約数和(自身を除く): 95652680

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 239, 340, 421, 478, 680, 842, 956, 1195, 1684, 1912, 2105, 2390, 3368, 4063, 4210, 4780, 7157, 8126, 8420, 9560, 14314, 16252, 16840, 20315, 28628, 32504, 35785, 40630, 57256, 71570, 81260, 100619, 143140, 162520, 201238, 286280, 402476, 503095, 804952, 1006190, 1710523, 2012380, 3421046, 4024760, 6842092, 8552615, 13684184, 17105230, 34210460, 68420920]

約数ペア:

[(1, 68420920), (2, 34210460), (4, 17105230), (5, 13684184), (8, 8552615), (10, 6842092), (17, 4024760), (20, 3421046), (34, 2012380), (40, 1710523), (68, 1006190), (85, 804952), (136, 503095), (170, 402476), (239, 286280), (340, 201238), (421, 162520), (478, 143140), (680, 100619), (842, 81260), (956, 71570), (1195, 57256), (1684, 40630), (1912, 35785), (2105, 32504), (2390, 28628), (3368, 20315), (4063, 16840), (4210, 16252), (4780, 14314), (7157, 9560), (8126, 8420)]