19802979

素因数分解:

$3^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{5153}}^1$

素因数の和:5227

約数の個数: 24

約数和(自身を含む): 33232992

約数和(自身を除く): 13430013

約数列:

[1, 3, 7, 9, 21, 61, 63, 183, 427, 549, 1281, 3843, 5153, 15459, 36071, 46377, 108213, 314333, 324639, 942999, 2200331, 2828997, 6600993, 19802979]

約数ペア:

[(1, 19802979), (3, 6600993), (7, 2828997), (9, 2200331), (21, 942999), (61, 324639), (63, 314333), (183, 108213), (427, 46377), (549, 36071), (1281, 15459), (3843, 5153)]