21231639

素因数分解:

$3^5\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{47}}^1$

素因数の和:99

約数の個数: 72

約数和(自身を含む): 38368512

約数和(自身を除く): 17136873

約数列:

[1, 3, 9, 11, 13, 27, 33, 39, 47, 81, 99, 117, 141, 143, 169, 243, 297, 351, 423, 429, 507, 517, 611, 891, 1053, 1269, 1287, 1521, 1551, 1833, 1859, 2673, 3159, 3807, 3861, 4563, 4653, 5499, 5577, 6721, 7943, 11421, 11583, 13689, 13959, 16497, 16731, 20163, 23829, 34749, 41067, 41877, 49491, 50193, 60489, 71487, 87373, 125631, 148473, 150579, 181467, 214461, 262119, 451737, 544401, 643383, 786357, 1633203, 1930149, 2359071, 7077213, 21231639]

約数ペア:

[(1, 21231639), (3, 7077213), (9, 2359071), (11, 1930149), (13, 1633203), (27, 786357), (33, 643383), (39, 544401), (47, 451737), (81, 262119), (99, 214461), (117, 181467), (141, 150579), (143, 148473), (169, 125631), (243, 87373), (297, 71487), (351, 60489), (423, 50193), (429, 49491), (507, 41877), (517, 41067), (611, 34749), (891, 23829), (1053, 20163), (1269, 16731), (1287, 16497), (1521, 13959), (1551, 13689), (1833, 11583), (1859, 11421), (2673, 7943), (3159, 6721), (3807, 5577), (3861, 5499), (4563, 4653)]