1990125

素因数分解:

$3^2\times 5^3\times {\mathrm{29}}^1\times {\mathrm{61}}^1$

素因数の和:111

約数の個数: 48

約数和(自身を含む): 3772080

約数和(自身を除く): 1781955

約数列:

[1, 3, 5, 9, 15, 25, 29, 45, 61, 75, 87, 125, 145, 183, 225, 261, 305, 375, 435, 549, 725, 915, 1125, 1305, 1525, 1769, 2175, 2745, 3625, 4575, 5307, 6525, 7625, 8845, 10875, 13725, 15921, 22875, 26535, 32625, 44225, 68625, 79605, 132675, 221125, 398025, 663375, 1990125]

約数ペア:

[(1, 1990125), (3, 663375), (5, 398025), (9, 221125), (15, 132675), (25, 79605), (29, 68625), (45, 44225), (61, 32625), (75, 26535), (87, 22875), (125, 15921), (145, 13725), (183, 10875), (225, 8845), (261, 7625), (305, 6525), (375, 5307), (435, 4575), (549, 3625), (725, 2745), (915, 2175), (1125, 1769), (1305, 1525)]