21631491

素因数分解:

$3^2\times 7^2\times {\mathrm{181}}^1\times {\mathrm{271}}^1$

素因数の和:472

約数の個数: 36

約数和(自身を含む): 36682464

約数和(自身を除く): 15050973

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 181, 271, 441, 543, 813, 1267, 1629, 1897, 2439, 3801, 5691, 8869, 11403, 13279, 17073, 26607, 39837, 49051, 79821, 119511, 147153, 343357, 441459, 1030071, 2403499, 3090213, 7210497, 21631491]

約数ペア:

[(1, 21631491), (3, 7210497), (7, 3090213), (9, 2403499), (21, 1030071), (49, 441459), (63, 343357), (147, 147153), (181, 119511), (271, 79821), (441, 49051), (543, 39837), (813, 26607), (1267, 17073), (1629, 13279), (1897, 11403), (2439, 8869), (3801, 5691)]