21516075

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{719}}^1$

素因数の和:761

約数の個数: 72

約数和(自身を含む): 46425600

約数和(自身を除く): 24909525

約数列:

[1, 3, 5, 7, 9, 15, 19, 21, 25, 35, 45, 57, 63, 75, 95, 105, 133, 171, 175, 225, 285, 315, 399, 475, 525, 665, 719, 855, 1197, 1425, 1575, 1995, 2157, 3325, 3595, 4275, 5033, 5985, 6471, 9975, 10785, 13661, 15099, 17975, 25165, 29925, 32355, 40983, 45297, 53925, 68305, 75495, 95627, 122949, 125825, 161775, 204915, 226485, 286881, 341525, 377475, 478135, 614745, 860643, 1024575, 1132425, 1434405, 2390675, 3073725, 4303215, 7172025, 21516075]

約数ペア:

[(1, 21516075), (3, 7172025), (5, 4303215), (7, 3073725), (9, 2390675), (15, 1434405), (19, 1132425), (21, 1024575), (25, 860643), (35, 614745), (45, 478135), (57, 377475), (63, 341525), (75, 286881), (95, 226485), (105, 204915), (133, 161775), (171, 125825), (175, 122949), (225, 95627), (285, 75495), (315, 68305), (399, 53925), (475, 45297), (525, 40983), (665, 32355), (719, 29925), (855, 25165), (1197, 17975), (1425, 15099), (1575, 13661), (1995, 10785), (2157, 9975), (3325, 6471), (3595, 5985), (4275, 5033)]