21754125

素因数分解:

$3^2\times 5^3\times {\mathrm{61}}^1\times {\mathrm{317}}^1$

素因数の和:399

約数の個数: 48

約数和(自身を含む): 39984048

約数和(自身を除く): 18229923

約数列:

[1, 3, 5, 9, 15, 25, 45, 61, 75, 125, 183, 225, 305, 317, 375, 549, 915, 951, 1125, 1525, 1585, 2745, 2853, 4575, 4755, 7625, 7925, 13725, 14265, 19337, 22875, 23775, 39625, 58011, 68625, 71325, 96685, 118875, 174033, 290055, 356625, 483425, 870165, 1450275, 2417125, 4350825, 7251375, 21754125]

約数ペア:

[(1, 21754125), (3, 7251375), (5, 4350825), (9, 2417125), (15, 1450275), (25, 870165), (45, 483425), (61, 356625), (75, 290055), (125, 174033), (183, 118875), (225, 96685), (305, 71325), (317, 68625), (375, 58011), (549, 39625), (915, 23775), (951, 22875), (1125, 19337), (1525, 14265), (1585, 13725), (2745, 7925), (2853, 7625), (4575, 4755)]