20989976

素因数分解:

$2^3\times 7^1\times {\mathrm{31}}^1\times {\mathrm{107}}^1\times {\mathrm{113}}^1$

素因数の和:264

約数の個数: 64

約数和(自身を含む): 47278080

約数和(自身を除く): 26288104

約数列:

[1, 2, 4, 7, 8, 14, 28, 31, 56, 62, 107, 113, 124, 214, 217, 226, 248, 428, 434, 452, 749, 791, 856, 868, 904, 1498, 1582, 1736, 2996, 3164, 3317, 3503, 5992, 6328, 6634, 7006, 12091, 13268, 14012, 23219, 24182, 24521, 26536, 28024, 46438, 48364, 49042, 84637, 92876, 96728, 98084, 169274, 185752, 196168, 338548, 374821, 677096, 749642, 1499284, 2623747, 2998568, 5247494, 10494988, 20989976]

約数ペア:

[(1, 20989976), (2, 10494988), (4, 5247494), (7, 2998568), (8, 2623747), (14, 1499284), (28, 749642), (31, 677096), (56, 374821), (62, 338548), (107, 196168), (113, 185752), (124, 169274), (214, 98084), (217, 96728), (226, 92876), (248, 84637), (428, 49042), (434, 48364), (452, 46438), (749, 28024), (791, 26536), (856, 24521), (868, 24182), (904, 23219), (1498, 14012), (1582, 13268), (1736, 12091), (2996, 7006), (3164, 6634), (3317, 6328), (3503, 5992)]