20165990

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{2543}}^1$

素因数の和:2624

約数の個数: 32

約数和(自身を含む): 39747456

約数和(自身を除く): 19581466

約数列:

[1, 2, 5, 10, 13, 26, 61, 65, 122, 130, 305, 610, 793, 1586, 2543, 3965, 5086, 7930, 12715, 25430, 33059, 66118, 155123, 165295, 310246, 330590, 775615, 1551230, 2016599, 4033198, 10082995, 20165990]

約数ペア:

[(1, 20165990), (2, 10082995), (5, 4033198), (10, 2016599), (13, 1551230), (26, 775615), (61, 330590), (65, 310246), (122, 165295), (130, 155123), (305, 66118), (610, 33059), (793, 25430), (1586, 12715), (2543, 7930), (3965, 5086)]