64871890

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{421}}^1\times {\mathrm{811}}^1$

素因数の和:1258

約数の個数: 32

約数和(自身を含む): 123359040

約数和(自身を除く): 58487150

約数列:

[1, 2, 5, 10, 19, 38, 95, 190, 421, 811, 842, 1622, 2105, 4055, 4210, 7999, 8110, 15409, 15998, 30818, 39995, 77045, 79990, 154090, 341431, 682862, 1707155, 3414310, 6487189, 12974378, 32435945, 64871890]

約数ペア:

[(1, 64871890), (2, 32435945), (5, 12974378), (10, 6487189), (19, 3414310), (38, 1707155), (95, 682862), (190, 341431), (421, 154090), (811, 79990), (842, 77045), (1622, 39995), (2105, 30818), (4055, 15998), (4210, 15409), (7999, 8110)]