21907809

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{313}}^1$

素因数の和:438

約数の個数: 48

約数和(自身を含む): 39970944

約数和(自身を除く): 18063135

約数列:

[1, 3, 7, 9, 11, 21, 33, 63, 77, 99, 101, 231, 303, 313, 693, 707, 909, 939, 1111, 2121, 2191, 2817, 3333, 3443, 6363, 6573, 7777, 9999, 10329, 19719, 23331, 24101, 30987, 31613, 69993, 72303, 94839, 216909, 221291, 284517, 347743, 663873, 1043229, 1991619, 2434201, 3129687, 7302603, 21907809]

約数ペア:

[(1, 21907809), (3, 7302603), (7, 3129687), (9, 2434201), (11, 1991619), (21, 1043229), (33, 663873), (63, 347743), (77, 284517), (99, 221291), (101, 216909), (231, 94839), (303, 72303), (313, 69993), (693, 31613), (707, 30987), (909, 24101), (939, 23331), (1111, 19719), (2121, 10329), (2191, 9999), (2817, 7777), (3333, 6573), (3443, 6363)]