21211125

素因数分解:

$3^1\times 5^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{229}}^1$

素因数の和:279

約数の個数: 64

約数和(自身を含む): 40185600

約数和(自身を除く): 18974475

約数列:

[1, 3, 5, 13, 15, 19, 25, 39, 57, 65, 75, 95, 125, 195, 229, 247, 285, 325, 375, 475, 687, 741, 975, 1145, 1235, 1425, 1625, 2375, 2977, 3435, 3705, 4351, 4875, 5725, 6175, 7125, 8931, 13053, 14885, 17175, 18525, 21755, 28625, 30875, 44655, 56563, 65265, 74425, 85875, 92625, 108775, 169689, 223275, 282815, 326325, 372125, 543875, 848445, 1116375, 1414075, 1631625, 4242225, 7070375, 21211125]

約数ペア:

[(1, 21211125), (3, 7070375), (5, 4242225), (13, 1631625), (15, 1414075), (19, 1116375), (25, 848445), (39, 543875), (57, 372125), (65, 326325), (75, 282815), (95, 223275), (125, 169689), (195, 108775), (229, 92625), (247, 85875), (285, 74425), (325, 65265), (375, 56563), (475, 44655), (687, 30875), (741, 28625), (975, 21755), (1145, 18525), (1235, 17175), (1425, 14885), (1625, 13053), (2375, 8931), (2977, 7125), (3435, 6175), (3705, 5725), (4351, 4875)]