21560775

素因数分解:

$3^1\times 5^2\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{431}}^1$

素因数の和:496

約数の個数: 48

約数和(自身を含む): 38568960

約数和(自身を除く): 17008185

約数列:

[1, 3, 5, 15, 23, 25, 29, 69, 75, 87, 115, 145, 345, 431, 435, 575, 667, 725, 1293, 1725, 2001, 2155, 2175, 3335, 6465, 9913, 10005, 10775, 12499, 16675, 29739, 32325, 37497, 49565, 50025, 62495, 148695, 187485, 247825, 287477, 312475, 743475, 862431, 937425, 1437385, 4312155, 7186925, 21560775]

約数ペア:

[(1, 21560775), (3, 7186925), (5, 4312155), (15, 1437385), (23, 937425), (25, 862431), (29, 743475), (69, 312475), (75, 287477), (87, 247825), (115, 187485), (145, 148695), (345, 62495), (431, 50025), (435, 49565), (575, 37497), (667, 32325), (725, 29739), (1293, 16675), (1725, 12499), (2001, 10775), (2155, 10005), (2175, 9913), (3335, 6465)]