20928978

素因数分解:

$2^1\times 3^2\times 7^2\times {\mathrm{61}}^1\times {\mathrm{389}}^1$

素因数の和:472

約数の個数: 72

約数和(自身を含む): 53752140

約数和(自身を除く): 32823162

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 49, 61, 63, 98, 122, 126, 147, 183, 294, 366, 389, 427, 441, 549, 778, 854, 882, 1098, 1167, 1281, 2334, 2562, 2723, 2989, 3501, 3843, 5446, 5978, 7002, 7686, 8169, 8967, 16338, 17934, 19061, 23729, 24507, 26901, 38122, 47458, 49014, 53802, 57183, 71187, 114366, 142374, 166103, 171549, 213561, 332206, 343098, 427122, 498309, 996618, 1162721, 1494927, 2325442, 2989854, 3488163, 6976326, 10464489, 20928978]

約数ペア:

[(1, 20928978), (2, 10464489), (3, 6976326), (6, 3488163), (7, 2989854), (9, 2325442), (14, 1494927), (18, 1162721), (21, 996618), (42, 498309), (49, 427122), (61, 343098), (63, 332206), (98, 213561), (122, 171549), (126, 166103), (147, 142374), (183, 114366), (294, 71187), (366, 57183), (389, 53802), (427, 49014), (441, 47458), (549, 38122), (778, 26901), (854, 24507), (882, 23729), (1098, 19061), (1167, 17934), (1281, 16338), (2334, 8967), (2562, 8169), (2723, 7686), (2989, 7002), (3501, 5978), (3843, 5446)]