21215628

素因数分解:

$2^2\times 3^3\times 7^2\times {\mathrm{19}}^1\times {\mathrm{211}}^1$

素因数の和:257

約数の個数: 144

約数和(自身を含む): 67670400

約数和(自身を除く): 46454772

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 19, 21, 27, 28, 36, 38, 42, 49, 54, 57, 63, 76, 84, 98, 108, 114, 126, 133, 147, 171, 189, 196, 211, 228, 252, 266, 294, 342, 378, 399, 422, 441, 513, 532, 588, 633, 684, 756, 798, 844, 882, 931, 1026, 1197, 1266, 1323, 1477, 1596, 1764, 1862, 1899, 2052, 2394, 2532, 2646, 2793, 2954, 3591, 3724, 3798, 4009, 4431, 4788, 5292, 5586, 5697, 5908, 7182, 7596, 8018, 8379, 8862, 10339, 11172, 11394, 12027, 13293, 14364, 16036, 16758, 17724, 20678, 22788, 24054, 25137, 26586, 28063, 31017, 33516, 36081, 39879, 41356, 48108, 50274, 53172, 56126, 62034, 72162, 79758, 84189, 93051, 100548, 108243, 112252, 124068, 144324, 159516, 168378, 186102, 196441, 216486, 252567, 279153, 336756, 372204, 392882, 432972, 505134, 558306, 589323, 757701, 785764, 1010268, 1116612, 1178646, 1515402, 1767969, 2357292, 3030804, 3535938, 5303907, 7071876, 10607814, 21215628]

約数ペア:

[(1, 21215628), (2, 10607814), (3, 7071876), (4, 5303907), (6, 3535938), (7, 3030804), (9, 2357292), (12, 1767969), (14, 1515402), (18, 1178646), (19, 1116612), (21, 1010268), (27, 785764), (28, 757701), (36, 589323), (38, 558306), (42, 505134), (49, 432972), (54, 392882), (57, 372204), (63, 336756), (76, 279153), (84, 252567), (98, 216486), (108, 196441), (114, 186102), (126, 168378), (133, 159516), (147, 144324), (171, 124068), (189, 112252), (196, 108243), (211, 100548), (228, 93051), (252, 84189), (266, 79758), (294, 72162), (342, 62034), (378, 56126), (399, 53172), (422, 50274), (441, 48108), (513, 41356), (532, 39879), (588, 36081), (633, 33516), (684, 31017), (756, 28063), (798, 26586), (844, 25137), (882, 24054), (931, 22788), (1026, 20678), (1197, 17724), (1266, 16758), (1323, 16036), (1477, 14364), (1596, 13293), (1764, 12027), (1862, 11394), (1899, 11172), (2052, 10339), (2394, 8862), (2532, 8379), (2646, 8018), (2793, 7596), (2954, 7182), (3591, 5908), (3724, 5697), (3798, 5586), (4009, 5292), (4431, 4788)]