21130125

素因数分解:

$3^1\times 5^3\times {\mathrm{29}}^2\times {\mathrm{67}}^1$

素因数の和:143

約数の個数: 48

約数和(自身を含む): 36958272

約数和(自身を除く): 15828147

約数列:

[1, 3, 5, 15, 25, 29, 67, 75, 87, 125, 145, 201, 335, 375, 435, 725, 841, 1005, 1675, 1943, 2175, 2523, 3625, 4205, 5025, 5829, 8375, 9715, 10875, 12615, 21025, 25125, 29145, 48575, 56347, 63075, 105125, 145725, 169041, 242875, 281735, 315375, 728625, 845205, 1408675, 4226025, 7043375, 21130125]

約数ペア:

[(1, 21130125), (3, 7043375), (5, 4226025), (15, 1408675), (25, 845205), (29, 728625), (67, 315375), (75, 281735), (87, 242875), (125, 169041), (145, 145725), (201, 105125), (335, 63075), (375, 56347), (435, 48575), (725, 29145), (841, 25125), (1005, 21025), (1675, 12615), (1943, 10875), (2175, 9715), (2523, 8375), (3625, 5829), (4205, 5025)]