20979140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{11527}}^1$

素因数の和:11556

約数の個数: 48

約数和(自身を含む): 54227712

約数和(自身を除く): 33248572

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 11527, 23054, 46108, 57635, 80689, 115270, 149851, 161378, 230540, 299702, 322756, 403445, 599404, 749255, 806890, 1048957, 1498510, 1613780, 2097914, 2997020, 4195828, 5244785, 10489570, 20979140]

約数ペア:

[(1, 20979140), (2, 10489570), (4, 5244785), (5, 4195828), (7, 2997020), (10, 2097914), (13, 1613780), (14, 1498510), (20, 1048957), (26, 806890), (28, 749255), (35, 599404), (52, 403445), (65, 322756), (70, 299702), (91, 230540), (130, 161378), (140, 149851), (182, 115270), (260, 80689), (364, 57635), (455, 46108), (910, 23054), (1820, 11527)]