21085870

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{2659}}^1$

素因数の和:2740

約数の個数: 32

約数和(自身を含む): 41559840

約数和(自身を除く): 20473970

約数列:

[1, 2, 5, 10, 13, 26, 61, 65, 122, 130, 305, 610, 793, 1586, 2659, 3965, 5318, 7930, 13295, 26590, 34567, 69134, 162199, 172835, 324398, 345670, 810995, 1621990, 2108587, 4217174, 10542935, 21085870]

約数ペア:

[(1, 21085870), (2, 10542935), (5, 4217174), (10, 2108587), (13, 1621990), (26, 810995), (61, 345670), (65, 324398), (122, 172835), (130, 162199), (305, 69134), (610, 34567), (793, 26590), (1586, 13295), (2659, 7930), (3965, 5318)]