21093020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{2617}}^1$

素因数の和:2670

約数の個数: 48

約数和(自身を含む): 49260288

約数和(自身を除く): 28167268

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 124, 130, 155, 260, 310, 403, 620, 806, 1612, 2015, 2617, 4030, 5234, 8060, 10468, 13085, 26170, 34021, 52340, 68042, 81127, 136084, 162254, 170105, 324508, 340210, 405635, 680420, 811270, 1054651, 1622540, 2109302, 4218604, 5273255, 10546510, 21093020]

約数ペア:

[(1, 21093020), (2, 10546510), (4, 5273255), (5, 4218604), (10, 2109302), (13, 1622540), (20, 1054651), (26, 811270), (31, 680420), (52, 405635), (62, 340210), (65, 324508), (124, 170105), (130, 162254), (155, 136084), (260, 81127), (310, 68042), (403, 52340), (620, 34021), (806, 26170), (1612, 13085), (2015, 10468), (2617, 8060), (4030, 5234)]