21386925

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{367}}^1$

素因数の和:427

約数の個数: 72

約数和(自身を含む): 45084416

約数和(自身を除く): 23697491

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 37, 45, 63, 75, 105, 111, 175, 185, 225, 259, 315, 333, 367, 525, 555, 777, 925, 1101, 1295, 1575, 1665, 1835, 2331, 2569, 2775, 3303, 3885, 5505, 6475, 7707, 8325, 9175, 11655, 12845, 13579, 16515, 19425, 23121, 27525, 38535, 40737, 58275, 64225, 67895, 82575, 95053, 115605, 122211, 192675, 203685, 285159, 339475, 475265, 578025, 611055, 855477, 1018425, 1425795, 2376325, 3055275, 4277385, 7128975, 21386925]

約数ペア:

[(1, 21386925), (3, 7128975), (5, 4277385), (7, 3055275), (9, 2376325), (15, 1425795), (21, 1018425), (25, 855477), (35, 611055), (37, 578025), (45, 475265), (63, 339475), (75, 285159), (105, 203685), (111, 192675), (175, 122211), (185, 115605), (225, 95053), (259, 82575), (315, 67895), (333, 64225), (367, 58275), (525, 40737), (555, 38535), (777, 27525), (925, 23121), (1101, 19425), (1295, 16515), (1575, 13579), (1665, 12845), (1835, 11655), (2331, 9175), (2569, 8325), (2775, 7707), (3303, 6475), (3885, 5505)]