15721875

素因数分解:

$3^2\times 5^5\times {\mathrm{13}}^1\times {\mathrm{43}}^1$

素因数の和:87

約数の個数: 72

約数和(自身を含む): 31279248

約数和(自身を除く): 15557373

約数列:

[1, 3, 5, 9, 13, 15, 25, 39, 43, 45, 65, 75, 117, 125, 129, 195, 215, 225, 325, 375, 387, 559, 585, 625, 645, 975, 1075, 1125, 1625, 1677, 1875, 1935, 2795, 2925, 3125, 3225, 4875, 5031, 5375, 5625, 8125, 8385, 9375, 9675, 13975, 14625, 16125, 24375, 25155, 26875, 28125, 40625, 41925, 48375, 69875, 73125, 80625, 121875, 125775, 134375, 209625, 241875, 349375, 365625, 403125, 628875, 1048125, 1209375, 1746875, 3144375, 5240625, 15721875]

約数ペア:

[(1, 15721875), (3, 5240625), (5, 3144375), (9, 1746875), (13, 1209375), (15, 1048125), (25, 628875), (39, 403125), (43, 365625), (45, 349375), (65, 241875), (75, 209625), (117, 134375), (125, 125775), (129, 121875), (195, 80625), (215, 73125), (225, 69875), (325, 48375), (375, 41925), (387, 40625), (559, 28125), (585, 26875), (625, 25155), (645, 24375), (975, 16125), (1075, 14625), (1125, 13975), (1625, 9675), (1677, 9375), (1875, 8385), (1935, 8125), (2795, 5625), (2925, 5375), (3125, 5031), (3225, 4875)]