638561690

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{258527}}^1$

素因数の和:258566

約数の個数: 32

約数和(自身を含む): 1302981120

約数和(自身を除く): 664419430

約数列:

[1, 2, 5, 10, 13, 19, 26, 38, 65, 95, 130, 190, 247, 494, 1235, 2470, 258527, 517054, 1292635, 2585270, 3360851, 4912013, 6721702, 9824026, 16804255, 24560065, 33608510, 49120130, 63856169, 127712338, 319280845, 638561690]

約数ペア:

[(1, 638561690), (2, 319280845), (5, 127712338), (10, 63856169), (13, 49120130), (19, 33608510), (26, 24560065), (38, 16804255), (65, 9824026), (95, 6721702), (130, 4912013), (190, 3360851), (247, 2585270), (494, 1292635), (1235, 517054), (2470, 258527)]