20841520

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{37217}}^1$

素因数の和:37237

約数の個数: 40

約数和(自身を含む): 55380384

約数和(自身を除く): 34538864

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 37217, 74434, 148868, 186085, 260519, 297736, 372170, 521038, 595472, 744340, 1042076, 1302595, 1488680, 2084152, 2605190, 2977360, 4168304, 5210380, 10420760, 20841520]

約数ペア:

[(1, 20841520), (2, 10420760), (4, 5210380), (5, 4168304), (7, 2977360), (8, 2605190), (10, 2084152), (14, 1488680), (16, 1302595), (20, 1042076), (28, 744340), (35, 595472), (40, 521038), (56, 372170), (70, 297736), (80, 260519), (112, 186085), (140, 148868), (280, 74434), (560, 37217)]