19874788

素因数分解:

$2^2\times {\mathrm{53}}^1\times {\mathrm{241}}^1\times {\mathrm{389}}^1$

素因数の和:687

約数の個数: 24

約数和(自身を含む): 35675640

約数和(自身を除く): 15800852

約数列:

[1, 2, 4, 53, 106, 212, 241, 389, 482, 778, 964, 1556, 12773, 20617, 25546, 41234, 51092, 82468, 93749, 187498, 374996, 4968697, 9937394, 19874788]

約数ペア:

[(1, 19874788), (2, 9937394), (4, 4968697), (53, 374996), (106, 187498), (212, 93749), (241, 82468), (389, 51092), (482, 41234), (778, 25546), (964, 20617), (1556, 12773)]