20647490

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{271}}^1\times {\mathrm{401}}^1$

素因数の和:698

約数の個数: 32

約数和(自身を含む): 39363840

約数和(自身を除く): 18716350

約数列:

[1, 2, 5, 10, 19, 38, 95, 190, 271, 401, 542, 802, 1355, 2005, 2710, 4010, 5149, 7619, 10298, 15238, 25745, 38095, 51490, 76190, 108671, 217342, 543355, 1086710, 2064749, 4129498, 10323745, 20647490]

約数ペア:

[(1, 20647490), (2, 10323745), (5, 4129498), (10, 2064749), (19, 1086710), (38, 543355), (95, 217342), (190, 108671), (271, 76190), (401, 51490), (542, 38095), (802, 25745), (1355, 15238), (2005, 10298), (2710, 7619), (4010, 5149)]