21319215

素因数分解:

$3^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{107}}^1\times {\mathrm{359}}^1$

素因数の和:511

約数の個数: 32

約数和(自身を含む): 35458560

約数和(自身を除く): 14139345

約数列:

[1, 3, 5, 15, 37, 107, 111, 185, 321, 359, 535, 555, 1077, 1605, 1795, 3959, 5385, 11877, 13283, 19795, 38413, 39849, 59385, 66415, 115239, 192065, 199245, 576195, 1421281, 4263843, 7106405, 21319215]

約数ペア:

[(1, 21319215), (3, 7106405), (5, 4263843), (15, 1421281), (37, 576195), (107, 199245), (111, 192065), (185, 115239), (321, 66415), (359, 59385), (535, 39849), (555, 38413), (1077, 19795), (1605, 13283), (1795, 11877), (3959, 5385)]