20645440

素因数分解:

$2^6\times 5^1\times {\mathrm{149}}^1\times {\mathrm{433}}^1$

素因数の和:599

約数の個数: 56

約数和(自身を含む): 49606200

約数和(自身を除く): 28960760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 149, 160, 298, 320, 433, 596, 745, 866, 1192, 1490, 1732, 2165, 2384, 2980, 3464, 4330, 4768, 5960, 6928, 8660, 9536, 11920, 13856, 17320, 23840, 27712, 34640, 47680, 64517, 69280, 129034, 138560, 258068, 322585, 516136, 645170, 1032272, 1290340, 2064544, 2580680, 4129088, 5161360, 10322720, 20645440]

約数ペア:

[(1, 20645440), (2, 10322720), (4, 5161360), (5, 4129088), (8, 2580680), (10, 2064544), (16, 1290340), (20, 1032272), (32, 645170), (40, 516136), (64, 322585), (80, 258068), (149, 138560), (160, 129034), (298, 69280), (320, 64517), (433, 47680), (596, 34640), (745, 27712), (866, 23840), (1192, 17320), (1490, 13856), (1732, 11920), (2165, 9536), (2384, 8660), (2980, 6928), (3464, 5960), (4330, 4768)]