21094725

素因数分解:

$3^1\times 5^2\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{211}}^1$

素因数の和:298

約数の個数: 48

約数和(自身を含む): 37013504

約数和(自身を除く): 15918779

約数列:

[1, 3, 5, 15, 25, 31, 43, 75, 93, 129, 155, 211, 215, 465, 633, 645, 775, 1055, 1075, 1333, 2325, 3165, 3225, 3999, 5275, 6541, 6665, 9073, 15825, 19623, 19995, 27219, 32705, 33325, 45365, 98115, 99975, 136095, 163525, 226825, 281263, 490575, 680475, 843789, 1406315, 4218945, 7031575, 21094725]

約数ペア:

[(1, 21094725), (3, 7031575), (5, 4218945), (15, 1406315), (25, 843789), (31, 680475), (43, 490575), (75, 281263), (93, 226825), (129, 163525), (155, 136095), (211, 99975), (215, 98115), (465, 45365), (633, 33325), (645, 32705), (775, 27219), (1055, 19995), (1075, 19623), (1333, 15825), (2325, 9073), (3165, 6665), (3225, 6541), (3999, 5275)]