21154575

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^2\times {\mathrm{1669}}^1$

素因数の和:1708

約数の個数: 36

約数和(自身を含む): 37895640

約数和(自身を除く): 16741065

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 169, 195, 325, 507, 845, 975, 1669, 2535, 4225, 5007, 8345, 12675, 21697, 25035, 41725, 65091, 108485, 125175, 282061, 325455, 542425, 846183, 1410305, 1627275, 4230915, 7051525, 21154575]

約数ペア:

[(1, 21154575), (3, 7051525), (5, 4230915), (13, 1627275), (15, 1410305), (25, 846183), (39, 542425), (65, 325455), (75, 282061), (169, 125175), (195, 108485), (325, 65091), (507, 41725), (845, 25035), (975, 21697), (1669, 12675), (2535, 8345), (4225, 5007)]