31681000

素因数分解:

$2^3\times 5^3\times {\mathrm{13}}^1\times {\mathrm{2437}}^1$

素因数の和:2471

約数の個数: 64

約数和(自身を含む): 79868880

約数和(自身を除く): 48187880

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 40, 50, 52, 65, 100, 104, 125, 130, 200, 250, 260, 325, 500, 520, 650, 1000, 1300, 1625, 2437, 2600, 3250, 4874, 6500, 9748, 12185, 13000, 19496, 24370, 31681, 48740, 60925, 63362, 97480, 121850, 126724, 158405, 243700, 253448, 304625, 316810, 487400, 609250, 633620, 792025, 1218500, 1267240, 1584050, 2437000, 3168100, 3960125, 6336200, 7920250, 15840500, 31681000]

約数ペア:

[(1, 31681000), (2, 15840500), (4, 7920250), (5, 6336200), (8, 3960125), (10, 3168100), (13, 2437000), (20, 1584050), (25, 1267240), (26, 1218500), (40, 792025), (50, 633620), (52, 609250), (65, 487400), (100, 316810), (104, 304625), (125, 253448), (130, 243700), (200, 158405), (250, 126724), (260, 121850), (325, 97480), (500, 63362), (520, 60925), (650, 48740), (1000, 31681), (1300, 24370), (1625, 19496), (2437, 13000), (2600, 12185), (3250, 9748), (4874, 6500)]