21139794

素因数分解:

$2^1\times 3^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{1481}}^1$

素因数の和:1563

約数の個数: 48

約数和(自身を含む): 50168664

約数和(自身を除く): 29028870

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 39, 61, 78, 117, 122, 183, 234, 366, 549, 793, 1098, 1481, 1586, 2379, 2962, 4443, 4758, 7137, 8886, 13329, 14274, 19253, 26658, 38506, 57759, 90341, 115518, 173277, 180682, 271023, 346554, 542046, 813069, 1174433, 1626138, 2348866, 3523299, 7046598, 10569897, 21139794]

約数ペア:

[(1, 21139794), (2, 10569897), (3, 7046598), (6, 3523299), (9, 2348866), (13, 1626138), (18, 1174433), (26, 813069), (39, 542046), (61, 346554), (78, 271023), (117, 180682), (122, 173277), (183, 115518), (234, 90341), (366, 57759), (549, 38506), (793, 26658), (1098, 19253), (1481, 14274), (1586, 13329), (2379, 8886), (2962, 7137), (4443, 4758)]