20681025

素因数分解:

$3^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{631}}^1$

素因数の和:686

約数の個数: 48

約数和(自身を含む): 37616640

約数和(自身を除く): 16935615

約数列:

[1, 3, 5, 15, 19, 23, 25, 57, 69, 75, 95, 115, 285, 345, 437, 475, 575, 631, 1311, 1425, 1725, 1893, 2185, 3155, 6555, 9465, 10925, 11989, 14513, 15775, 32775, 35967, 43539, 47325, 59945, 72565, 179835, 217695, 275747, 299725, 362825, 827241, 899175, 1088475, 1378735, 4136205, 6893675, 20681025]

約数ペア:

[(1, 20681025), (3, 6893675), (5, 4136205), (15, 1378735), (19, 1088475), (23, 899175), (25, 827241), (57, 362825), (69, 299725), (75, 275747), (95, 217695), (115, 179835), (285, 72565), (345, 59945), (437, 47325), (475, 43539), (575, 35967), (631, 32775), (1311, 15775), (1425, 14513), (1725, 11989), (1893, 10925), (2185, 9465), (3155, 6555)]