20921550

素因数分解:

$2^1\times 3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{10729}}^1$

素因数の和:10757

約数の個数: 48

約数和(自身を含む): 55881840

約数和(自身を除く): 34960290

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 25, 26, 30, 39, 50, 65, 75, 78, 130, 150, 195, 325, 390, 650, 975, 1950, 10729, 21458, 32187, 53645, 64374, 107290, 139477, 160935, 268225, 278954, 321870, 418431, 536450, 697385, 804675, 836862, 1394770, 1609350, 2092155, 3486925, 4184310, 6973850, 10460775, 20921550]

約数ペア:

[(1, 20921550), (2, 10460775), (3, 6973850), (5, 4184310), (6, 3486925), (10, 2092155), (13, 1609350), (15, 1394770), (25, 836862), (26, 804675), (30, 697385), (39, 536450), (50, 418431), (65, 321870), (75, 278954), (78, 268225), (130, 160935), (150, 139477), (195, 107290), (325, 64374), (390, 53645), (650, 32187), (975, 21458), (1950, 10729)]