19971778

素因数分解:

$2^1\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{73}}^1\times {\mathrm{89}}^1$

素因数の和:246

約数の個数: 32

約数和(自身を含む): 32367600

約数和(自身を除く): 12395822

約数列:

[1, 2, 29, 53, 58, 73, 89, 106, 146, 178, 1537, 2117, 2581, 3074, 3869, 4234, 4717, 5162, 6497, 7738, 9434, 12994, 112201, 136793, 188413, 224402, 273586, 344341, 376826, 688682, 9985889, 19971778]

約数ペア:

[(1, 19971778), (2, 9985889), (29, 688682), (53, 376826), (58, 344341), (73, 273586), (89, 224402), (106, 188413), (146, 136793), (178, 112201), (1537, 12994), (2117, 9434), (2581, 7738), (3074, 6497), (3869, 5162), (4234, 4717)]