21721425

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{113}}^1\times {\mathrm{233}}^1$

素因数の和:370

約数の個数: 48

約数和(自身を含む): 39693888

約数和(自身を除く): 17972463

約数列:

[1, 3, 5, 11, 15, 25, 33, 55, 75, 113, 165, 233, 275, 339, 565, 699, 825, 1165, 1243, 1695, 2563, 2825, 3495, 3729, 5825, 6215, 7689, 8475, 12815, 17475, 18645, 26329, 31075, 38445, 64075, 78987, 93225, 131645, 192225, 289619, 394935, 658225, 868857, 1448095, 1974675, 4344285, 7240475, 21721425]

約数ペア:

[(1, 21721425), (3, 7240475), (5, 4344285), (11, 1974675), (15, 1448095), (25, 868857), (33, 658225), (55, 394935), (75, 289619), (113, 192225), (165, 131645), (233, 93225), (275, 78987), (339, 64075), (565, 38445), (699, 31075), (825, 26329), (1165, 18645), (1243, 17475), (1695, 12815), (2563, 8475), (2825, 7689), (3495, 6215), (3729, 5825)]