20921750

素因数分解:

$2^1\times 5^3\times {\mathrm{53}}^1\times {\mathrm{1579}}^1$

素因数の和:1649

約数の個数: 32

約数和(自身を含む): 39929760

約数和(自身を除く): 19008010

約数列:

[1, 2, 5, 10, 25, 50, 53, 106, 125, 250, 265, 530, 1325, 1579, 2650, 3158, 6625, 7895, 13250, 15790, 39475, 78950, 83687, 167374, 197375, 394750, 418435, 836870, 2092175, 4184350, 10460875, 20921750]

約数ペア:

[(1, 20921750), (2, 10460875), (5, 4184350), (10, 2092175), (25, 836870), (50, 418435), (53, 394750), (106, 197375), (125, 167374), (250, 83687), (265, 78950), (530, 39475), (1325, 15790), (1579, 13250), (2650, 7895), (3158, 6625)]