21031425

素因数分解:

$3^2\times 5^2\times {\mathrm{211}}^1\times {\mathrm{443}}^1$

素因数の和:670

約数の個数: 36

約数和(自身を含む): 37933584

約数和(自身を除く): 16902159

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 211, 225, 443, 633, 1055, 1329, 1899, 2215, 3165, 3987, 5275, 6645, 9495, 11075, 15825, 19935, 33225, 47475, 93473, 99675, 280419, 467365, 841257, 1402095, 2336825, 4206285, 7010475, 21031425]

約数ペア:

[(1, 21031425), (3, 7010475), (5, 4206285), (9, 2336825), (15, 1402095), (25, 841257), (45, 467365), (75, 280419), (211, 99675), (225, 93473), (443, 47475), (633, 33225), (1055, 19935), (1329, 15825), (1899, 11075), (2215, 9495), (3165, 6645), (3987, 5275)]