20458900

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{2657}}^1$

素因数の和:2689

約数の個数: 72

約数和(自身を含む): 55371456

約数和(自身を除く): 34912556

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 25, 28, 35, 44, 50, 55, 70, 77, 100, 110, 140, 154, 175, 220, 275, 308, 350, 385, 550, 700, 770, 1100, 1540, 1925, 2657, 3850, 5314, 7700, 10628, 13285, 18599, 26570, 29227, 37198, 53140, 58454, 66425, 74396, 92995, 116908, 132850, 146135, 185990, 204589, 265700, 292270, 371980, 409178, 464975, 584540, 730675, 818356, 929950, 1022945, 1461350, 1859900, 2045890, 2922700, 4091780, 5114725, 10229450, 20458900]

約数ペア:

[(1, 20458900), (2, 10229450), (4, 5114725), (5, 4091780), (7, 2922700), (10, 2045890), (11, 1859900), (14, 1461350), (20, 1022945), (22, 929950), (25, 818356), (28, 730675), (35, 584540), (44, 464975), (50, 409178), (55, 371980), (70, 292270), (77, 265700), (100, 204589), (110, 185990), (140, 146135), (154, 132850), (175, 116908), (220, 92995), (275, 74396), (308, 66425), (350, 58454), (385, 53140), (550, 37198), (700, 29227), (770, 26570), (1100, 18599), (1540, 13285), (1925, 10628), (2657, 7700), (3850, 5314)]