20910500

素因数分解:

$2^2\times 5^3\times {\mathrm{13}}^1\times {\mathrm{3217}}^1$

素因数の和:3249

約数の個数: 48

約数和(自身を含む): 49196784

約数和(自身を除く): 28286284

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 125, 130, 250, 260, 325, 500, 650, 1300, 1625, 3217, 3250, 6434, 6500, 12868, 16085, 32170, 41821, 64340, 80425, 83642, 160850, 167284, 209105, 321700, 402125, 418210, 804250, 836420, 1045525, 1608500, 2091050, 4182100, 5227625, 10455250, 20910500]

約数ペア:

[(1, 20910500), (2, 10455250), (4, 5227625), (5, 4182100), (10, 2091050), (13, 1608500), (20, 1045525), (25, 836420), (26, 804250), (50, 418210), (52, 402125), (65, 321700), (100, 209105), (125, 167284), (130, 160850), (250, 83642), (260, 80425), (325, 64340), (500, 41821), (650, 32170), (1300, 16085), (1625, 12868), (3217, 6500), (3250, 6434)]