18878625

素因数分解:

$3^2\times 5^3\times {\mathrm{97}}^1\times {\mathrm{173}}^1$

素因数の和:291

約数の個数: 48

約数和(自身を含む): 34581456

約数和(自身を除く): 15702831

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 97, 125, 173, 225, 291, 375, 485, 519, 865, 873, 1125, 1455, 1557, 2425, 2595, 4325, 4365, 7275, 7785, 12125, 12975, 16781, 21625, 21825, 36375, 38925, 50343, 64875, 83905, 109125, 151029, 194625, 251715, 419525, 755145, 1258575, 2097625, 3775725, 6292875, 18878625]

約数ペア:

[(1, 18878625), (3, 6292875), (5, 3775725), (9, 2097625), (15, 1258575), (25, 755145), (45, 419525), (75, 251715), (97, 194625), (125, 151029), (173, 109125), (225, 83905), (291, 64875), (375, 50343), (485, 38925), (519, 36375), (865, 21825), (873, 21625), (1125, 16781), (1455, 12975), (1557, 12125), (2425, 7785), (2595, 7275), (4325, 4365)]