21491775

素因数分解:

$3^2\times 5^2\times {\mathrm{23}}^1\times {\mathrm{4153}}^1$

素因数の和:4192

約数の個数: 36

約数和(自身を含む): 40177488

約数和(自身を除く): 18685713

約数列:

[1, 3, 5, 9, 15, 23, 25, 45, 69, 75, 115, 207, 225, 345, 575, 1035, 1725, 4153, 5175, 12459, 20765, 37377, 62295, 95519, 103825, 186885, 286557, 311475, 477595, 859671, 934425, 1432785, 2387975, 4298355, 7163925, 21491775]

約数ペア:

[(1, 21491775), (3, 7163925), (5, 4298355), (9, 2387975), (15, 1432785), (23, 934425), (25, 859671), (45, 477595), (69, 311475), (75, 286557), (115, 186885), (207, 103825), (225, 95519), (345, 62295), (575, 37377), (1035, 20765), (1725, 12459), (4153, 5175)]