21238125

素因数分解:

$3^1\times 5^4\times {\mathrm{47}}^1\times {\mathrm{241}}^1$

素因数の和:311

約数の個数: 40

約数和(自身を含む): 36288384

約数和(自身を除く): 15050259

約数列:

[1, 3, 5, 15, 25, 47, 75, 125, 141, 235, 241, 375, 625, 705, 723, 1175, 1205, 1875, 3525, 3615, 5875, 6025, 11327, 17625, 18075, 29375, 30125, 33981, 56635, 88125, 90375, 150625, 169905, 283175, 451875, 849525, 1415875, 4247625, 7079375, 21238125]

約数ペア:

[(1, 21238125), (3, 7079375), (5, 4247625), (15, 1415875), (25, 849525), (47, 451875), (75, 283175), (125, 169905), (141, 150625), (235, 90375), (241, 88125), (375, 56635), (625, 33981), (705, 30125), (723, 29375), (1175, 18075), (1205, 17625), (1875, 11327), (3525, 6025), (3615, 5875)]