21915165

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{557}}^1$

素因数の和:669

約数の個数: 32

約数和(自身を含む): 36533376

約数和(自身を除く): 14618211

約数列:

[1, 3, 5, 15, 43, 61, 129, 183, 215, 305, 557, 645, 915, 1671, 2623, 2785, 7869, 8355, 13115, 23951, 33977, 39345, 71853, 101931, 119755, 169885, 359265, 509655, 1461011, 4383033, 7305055, 21915165]

約数ペア:

[(1, 21915165), (3, 7305055), (5, 4383033), (15, 1461011), (43, 509655), (61, 359265), (129, 169885), (183, 119755), (215, 101931), (305, 71853), (557, 39345), (645, 33977), (915, 23951), (1671, 13115), (2623, 8355), (2785, 7869)]