21430125

素因数分解:

$3^2\times 5^3\times {\mathrm{43}}^1\times {\mathrm{443}}^1$

素因数の和:507

約数の個数: 48

約数和(自身を含む): 39619008

約数和(自身を除く): 18188883

約数列:

[1, 3, 5, 9, 15, 25, 43, 45, 75, 125, 129, 215, 225, 375, 387, 443, 645, 1075, 1125, 1329, 1935, 2215, 3225, 3987, 5375, 6645, 9675, 11075, 16125, 19049, 19935, 33225, 48375, 55375, 57147, 95245, 99675, 166125, 171441, 285735, 476225, 498375, 857205, 1428675, 2381125, 4286025, 7143375, 21430125]

約数ペア:

[(1, 21430125), (3, 7143375), (5, 4286025), (9, 2381125), (15, 1428675), (25, 857205), (43, 498375), (45, 476225), (75, 285735), (125, 171441), (129, 166125), (215, 99675), (225, 95245), (375, 57147), (387, 55375), (443, 48375), (645, 33225), (1075, 19935), (1125, 19049), (1329, 16125), (1935, 11075), (2215, 9675), (3225, 6645), (3987, 5375)]