21525975

素因数分解:

$3^2\times 5^2\times {\mathrm{29}}^1\times {\mathrm{3299}}^1$

素因数の和:3344

約数の個数: 36

約数和(自身を含む): 39897000

約数和(自身を除く): 18371025

約数列:

[1, 3, 5, 9, 15, 25, 29, 45, 75, 87, 145, 225, 261, 435, 725, 1305, 2175, 3299, 6525, 9897, 16495, 29691, 49485, 82475, 95671, 148455, 247425, 287013, 478355, 742275, 861039, 1435065, 2391775, 4305195, 7175325, 21525975]

約数ペア:

[(1, 21525975), (3, 7175325), (5, 4305195), (9, 2391775), (15, 1435065), (25, 861039), (29, 742275), (45, 478355), (75, 287013), (87, 247425), (145, 148455), (225, 95671), (261, 82475), (435, 49485), (725, 29691), (1305, 16495), (2175, 9897), (3299, 6525)]