21015345

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{2293}}^1$

素因数の和:2361

約数の個数: 32

約数和(自身を含む): 36997632

約数和(自身を除く): 15982287

約数列:

[1, 3, 5, 13, 15, 39, 47, 65, 141, 195, 235, 611, 705, 1833, 2293, 3055, 6879, 9165, 11465, 29809, 34395, 89427, 107771, 149045, 323313, 447135, 538855, 1401023, 1616565, 4203069, 7005115, 21015345]

約数ペア:

[(1, 21015345), (3, 7005115), (5, 4203069), (13, 1616565), (15, 1401023), (39, 538855), (47, 447135), (65, 323313), (141, 149045), (195, 107771), (235, 89427), (611, 34395), (705, 29809), (1833, 11465), (2293, 9165), (3055, 6879)]