21108135

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{61}}^1$

素因数の和:168

約数の個数: 64

約数和(自身を含む): 38568960

約数和(自身を除く): 17460825

約数列:

[1, 3, 5, 15, 17, 23, 51, 59, 61, 69, 85, 115, 177, 183, 255, 295, 305, 345, 391, 885, 915, 1003, 1037, 1173, 1357, 1403, 1955, 3009, 3111, 3599, 4071, 4209, 5015, 5185, 5865, 6785, 7015, 10797, 15045, 15555, 17995, 20355, 21045, 23069, 23851, 53985, 61183, 69207, 71553, 82777, 115345, 119255, 183549, 248331, 305915, 346035, 357765, 413885, 917745, 1241655, 1407209, 4221627, 7036045, 21108135]

約数ペア:

[(1, 21108135), (3, 7036045), (5, 4221627), (15, 1407209), (17, 1241655), (23, 917745), (51, 413885), (59, 357765), (61, 346035), (69, 305915), (85, 248331), (115, 183549), (177, 119255), (183, 115345), (255, 82777), (295, 71553), (305, 69207), (345, 61183), (391, 53985), (885, 23851), (915, 23069), (1003, 21045), (1037, 20355), (1173, 17995), (1357, 15555), (1403, 15045), (1955, 10797), (3009, 7015), (3111, 6785), (3599, 5865), (4071, 5185), (4209, 5015)]