21207945

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{1627}}^1$

素因数の和:1725

約数の個数: 32

約数和(自身を含む): 37509120

約数和(自身を除く): 16301175

約数列:

[1, 3, 5, 11, 15, 33, 55, 79, 165, 237, 395, 869, 1185, 1627, 2607, 4345, 4881, 8135, 13035, 17897, 24405, 53691, 89485, 128533, 268455, 385599, 642665, 1413863, 1927995, 4241589, 7069315, 21207945]

約数ペア:

[(1, 21207945), (3, 7069315), (5, 4241589), (11, 1927995), (15, 1413863), (33, 642665), (55, 385599), (79, 268455), (165, 128533), (237, 89485), (395, 53691), (869, 24405), (1185, 17897), (1627, 13035), (2607, 8135), (4345, 4881)]