21561318

素因数分解:

$2^1\times 3^2\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{313}}^1$

素因数の和:453

約数の個数: 48

約数和(自身を含む): 48494160

約数和(自身を除く): 26932842

約数列:

[1, 2, 3, 6, 9, 18, 43, 86, 89, 129, 178, 258, 267, 313, 387, 534, 626, 774, 801, 939, 1602, 1878, 2817, 3827, 5634, 7654, 11481, 13459, 22962, 26918, 27857, 34443, 40377, 55714, 68886, 80754, 83571, 121131, 167142, 242262, 250713, 501426, 1197851, 2395702, 3593553, 7187106, 10780659, 21561318]

約数ペア:

[(1, 21561318), (2, 10780659), (3, 7187106), (6, 3593553), (9, 2395702), (18, 1197851), (43, 501426), (86, 250713), (89, 242262), (129, 167142), (178, 121131), (258, 83571), (267, 80754), (313, 68886), (387, 55714), (534, 40377), (626, 34443), (774, 27857), (801, 26918), (939, 22962), (1602, 13459), (1878, 11481), (2817, 7654), (3827, 5634)]