81291340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{4283}}^1$

素因数の和:4378

約数の個数: 48

約数和(自身を含む): 186405408

約数和(自身を除く): 105114068

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 73, 130, 146, 260, 292, 365, 730, 949, 1460, 1898, 3796, 4283, 4745, 8566, 9490, 17132, 18980, 21415, 42830, 55679, 85660, 111358, 222716, 278395, 312659, 556790, 625318, 1113580, 1250636, 1563295, 3126590, 4064567, 6253180, 8129134, 16258268, 20322835, 40645670, 81291340]

約数ペア:

[(1, 81291340), (2, 40645670), (4, 20322835), (5, 16258268), (10, 8129134), (13, 6253180), (20, 4064567), (26, 3126590), (52, 1563295), (65, 1250636), (73, 1113580), (130, 625318), (146, 556790), (260, 312659), (292, 278395), (365, 222716), (730, 111358), (949, 85660), (1460, 55679), (1898, 42830), (3796, 21415), (4283, 18980), (4745, 17132), (8566, 9490)]