78837640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{281563}}^1$

素因数の和:281581

約数の個数: 32

約数和(自身を含む): 202726080

約数和(自身を除く): 123888440

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 281563, 563126, 1126252, 1407815, 1970941, 2252504, 2815630, 3941882, 5631260, 7883764, 9854705, 11262520, 15767528, 19709410, 39418820, 78837640]

約数ペア:

[(1, 78837640), (2, 39418820), (4, 19709410), (5, 15767528), (7, 11262520), (8, 9854705), (10, 7883764), (14, 5631260), (20, 3941882), (28, 2815630), (35, 2252504), (40, 1970941), (56, 1407815), (70, 1126252), (140, 563126), (280, 281563)]