21172515

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{15511}}^1$

素因数の和:15539

約数の個数: 32

約数和(自身を含む): 41696256

約数和(自身を除く): 20523741

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 65, 91, 105, 195, 273, 455, 1365, 15511, 46533, 77555, 108577, 201643, 232665, 325731, 542885, 604929, 1008215, 1411501, 1628655, 3024645, 4234503, 7057505, 21172515]

約数ペア:

[(1, 21172515), (3, 7057505), (5, 4234503), (7, 3024645), (13, 1628655), (15, 1411501), (21, 1008215), (35, 604929), (39, 542885), (65, 325731), (91, 232665), (105, 201643), (195, 108577), (273, 77555), (455, 46533), (1365, 15511)]