21521654

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{79}}^1$

素因数の和:189

約数の個数: 64

約数和(自身を含む): 42854400

約数和(自身を除く): 21332746

約数列:

[1, 2, 7, 11, 14, 22, 29, 58, 61, 77, 79, 122, 154, 158, 203, 319, 406, 427, 553, 638, 671, 854, 869, 1106, 1342, 1738, 1769, 2233, 2291, 3538, 4466, 4582, 4697, 4819, 6083, 9394, 9638, 12166, 12383, 16037, 19459, 24766, 25201, 32074, 33733, 38918, 50402, 53009, 67466, 106018, 136213, 139751, 176407, 272426, 279502, 352814, 371063, 742126, 978257, 1537261, 1956514, 3074522, 10760827, 21521654]

約数ペア:

[(1, 21521654), (2, 10760827), (7, 3074522), (11, 1956514), (14, 1537261), (22, 978257), (29, 742126), (58, 371063), (61, 352814), (77, 279502), (79, 272426), (122, 176407), (154, 139751), (158, 136213), (203, 106018), (319, 67466), (406, 53009), (427, 50402), (553, 38918), (638, 33733), (671, 32074), (854, 25201), (869, 24766), (1106, 19459), (1342, 16037), (1738, 12383), (1769, 12166), (2233, 9638), (2291, 9394), (3538, 6083), (4466, 4819), (4582, 4697)]