20621538

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{2683}}^1$

素因数の和:2759

約数の個数: 48

約数和(自身を含む): 51919296

約数和(自身を除く): 31297758

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 61, 63, 122, 126, 183, 366, 427, 549, 854, 1098, 1281, 2562, 2683, 3843, 5366, 7686, 8049, 16098, 18781, 24147, 37562, 48294, 56343, 112686, 163663, 169029, 327326, 338058, 490989, 981978, 1145641, 1472967, 2291282, 2945934, 3436923, 6873846, 10310769, 20621538]

約数ペア:

[(1, 20621538), (2, 10310769), (3, 6873846), (6, 3436923), (7, 2945934), (9, 2291282), (14, 1472967), (18, 1145641), (21, 981978), (42, 490989), (61, 338058), (63, 327326), (122, 169029), (126, 163663), (183, 112686), (366, 56343), (427, 48294), (549, 37562), (854, 24147), (1098, 18781), (1281, 16098), (2562, 8049), (2683, 7686), (3843, 5366)]