20937357

素因数分解:

$3^2\times 7^2\times {\mathrm{197}}^1\times {\mathrm{241}}^1$

素因数の和:458

約数の個数: 36

約数和(自身を含む): 35505756

約数和(自身を除く): 14568399

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 197, 241, 441, 591, 723, 1379, 1687, 1773, 2169, 4137, 5061, 9653, 11809, 12411, 15183, 28959, 35427, 47477, 86877, 106281, 142431, 332339, 427293, 997017, 2326373, 2991051, 6979119, 20937357]

約数ペア:

[(1, 20937357), (3, 6979119), (7, 2991051), (9, 2326373), (21, 997017), (49, 427293), (63, 332339), (147, 142431), (197, 106281), (241, 86877), (441, 47477), (591, 35427), (723, 28959), (1379, 15183), (1687, 12411), (1773, 11809), (2169, 9653), (4137, 5061)]