20657650

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{521}}^1$

素因数の和:607

約数の個数: 48

約数和(自身を含む): 42137928

約数和(自身を除く): 21480278

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 61, 65, 122, 130, 305, 325, 521, 610, 650, 793, 1042, 1525, 1586, 2605, 3050, 3965, 5210, 6773, 7930, 13025, 13546, 19825, 26050, 31781, 33865, 39650, 63562, 67730, 158905, 169325, 317810, 338650, 413153, 794525, 826306, 1589050, 2065765, 4131530, 10328825, 20657650]

約数ペア:

[(1, 20657650), (2, 10328825), (5, 4131530), (10, 2065765), (13, 1589050), (25, 826306), (26, 794525), (50, 413153), (61, 338650), (65, 317810), (122, 169325), (130, 158905), (305, 67730), (325, 63562), (521, 39650), (610, 33865), (650, 31781), (793, 26050), (1042, 19825), (1525, 13546), (1586, 13025), (2605, 7930), (3050, 6773), (3965, 5210)]