21684915

素因数分解:

$3^4\times 5^1\times 7^1\times {\mathrm{7649}}^1$

素因数の和:7673

約数の個数: 40

約数和(自身を含む): 44431200

約数和(自身を除く): 22746285

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 81, 105, 135, 189, 315, 405, 567, 945, 2835, 7649, 22947, 38245, 53543, 68841, 114735, 160629, 206523, 267715, 344205, 481887, 619569, 803145, 1032615, 1445661, 2409435, 3097845, 4336983, 7228305, 21684915]

約数ペア:

[(1, 21684915), (3, 7228305), (5, 4336983), (7, 3097845), (9, 2409435), (15, 1445661), (21, 1032615), (27, 803145), (35, 619569), (45, 481887), (63, 344205), (81, 267715), (105, 206523), (135, 160629), (189, 114735), (315, 68841), (405, 53543), (567, 38245), (945, 22947), (2835, 7649)]