21316239

素因数分解:

$3^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{313}}^1$

素因数の和:396

約数の個数: 48

約数和(自身を含む): 37619712

約数和(自身を除く): 16303473

約数列:

[1, 3, 7, 9, 21, 23, 47, 63, 69, 141, 161, 207, 313, 329, 423, 483, 939, 987, 1081, 1449, 2191, 2817, 2961, 3243, 6573, 7199, 7567, 9729, 14711, 19719, 21597, 22701, 44133, 50393, 64791, 68103, 102977, 132399, 151179, 308931, 338353, 453537, 926793, 1015059, 2368471, 3045177, 7105413, 21316239]

約数ペア:

[(1, 21316239), (3, 7105413), (7, 3045177), (9, 2368471), (21, 1015059), (23, 926793), (47, 453537), (63, 338353), (69, 308931), (141, 151179), (161, 132399), (207, 102977), (313, 68103), (329, 64791), (423, 50393), (483, 44133), (939, 22701), (987, 21597), (1081, 19719), (1449, 14711), (2191, 9729), (2817, 7567), (2961, 7199), (3243, 6573)]