21581625

素因数分解:

$3^1\times 5^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{233}}^1$

素因数の和:283

約数の個数: 64

約数和(自身を含む): 40884480

約数和(自身を除く): 19302855

約数列:

[1, 3, 5, 13, 15, 19, 25, 39, 57, 65, 75, 95, 125, 195, 233, 247, 285, 325, 375, 475, 699, 741, 975, 1165, 1235, 1425, 1625, 2375, 3029, 3495, 3705, 4427, 4875, 5825, 6175, 7125, 9087, 13281, 15145, 17475, 18525, 22135, 29125, 30875, 45435, 57551, 66405, 75725, 87375, 92625, 110675, 172653, 227175, 287755, 332025, 378625, 553375, 863265, 1135875, 1438775, 1660125, 4316325, 7193875, 21581625]

約数ペア:

[(1, 21581625), (3, 7193875), (5, 4316325), (13, 1660125), (15, 1438775), (19, 1135875), (25, 863265), (39, 553375), (57, 378625), (65, 332025), (75, 287755), (95, 227175), (125, 172653), (195, 110675), (233, 92625), (247, 87375), (285, 75725), (325, 66405), (375, 57551), (475, 45435), (699, 30875), (741, 29125), (975, 22135), (1165, 18525), (1235, 17475), (1425, 15145), (1625, 13281), (2375, 9087), (3029, 7125), (3495, 6175), (3705, 5825), (4427, 4875)]