20812904

素因数分解:

$2^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{631}}^1$

素因数の和:694

約数の個数: 64

約数和(自身を含む): 48537600

約数和(自身を除く): 27724696

約数列:

[1, 2, 4, 7, 8, 14, 19, 28, 31, 38, 56, 62, 76, 124, 133, 152, 217, 248, 266, 434, 532, 589, 631, 868, 1064, 1178, 1262, 1736, 2356, 2524, 4123, 4417, 4712, 5048, 8246, 8834, 11989, 16492, 17668, 19561, 23978, 32984, 35336, 39122, 47956, 78244, 83923, 95912, 136927, 156488, 167846, 273854, 335692, 371659, 547708, 671384, 743318, 1095416, 1486636, 2601613, 2973272, 5203226, 10406452, 20812904]

約数ペア:

[(1, 20812904), (2, 10406452), (4, 5203226), (7, 2973272), (8, 2601613), (14, 1486636), (19, 1095416), (28, 743318), (31, 671384), (38, 547708), (56, 371659), (62, 335692), (76, 273854), (124, 167846), (133, 156488), (152, 136927), (217, 95912), (248, 83923), (266, 78244), (434, 47956), (532, 39122), (589, 35336), (631, 32984), (868, 23978), (1064, 19561), (1178, 17668), (1262, 16492), (1736, 11989), (2356, 8834), (2524, 8246), (4123, 5048), (4417, 4712)]