390806420

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{179269}}^1$

素因数の和:179387

約数の個数: 24

約数和(自身を含む): 828227400

約数和(自身を除く): 437420980

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 179269, 358538, 717076, 896345, 1792690, 3585380, 19540321, 39080642, 78161284, 97701605, 195403210, 390806420]

約数ペア:

[(1, 390806420), (2, 195403210), (4, 97701605), (5, 78161284), (10, 39080642), (20, 19540321), (109, 3585380), (218, 1792690), (436, 896345), (545, 717076), (1090, 358538), (2180, 179269)]