21749984

素因数分解:

$2^5\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{431}}^1$

素因数の和:543

約数の個数: 48

約数和(自身を含む): 45722880

約数和(自身を除く): 23972896

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 76, 83, 152, 166, 304, 332, 431, 608, 664, 862, 1328, 1577, 1724, 2656, 3154, 3448, 6308, 6896, 8189, 12616, 13792, 16378, 25232, 32756, 35773, 50464, 65512, 71546, 131024, 143092, 262048, 286184, 572368, 679687, 1144736, 1359374, 2718748, 5437496, 10874992, 21749984]

約数ペア:

[(1, 21749984), (2, 10874992), (4, 5437496), (8, 2718748), (16, 1359374), (19, 1144736), (32, 679687), (38, 572368), (76, 286184), (83, 262048), (152, 143092), (166, 131024), (304, 71546), (332, 65512), (431, 50464), (608, 35773), (664, 32756), (862, 25232), (1328, 16378), (1577, 13792), (1724, 12616), (2656, 8189), (3154, 6896), (3448, 6308)]