408907420

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{147089}}^1$

素因数の和:147237

約数の個数: 24

約数和(自身を含む): 864889200

約数和(自身を除く): 455981780

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 556, 695, 1390, 2780, 147089, 294178, 588356, 735445, 1470890, 2941780, 20445371, 40890742, 81781484, 102226855, 204453710, 408907420]

約数ペア:

[(1, 408907420), (2, 204453710), (4, 102226855), (5, 81781484), (10, 40890742), (20, 20445371), (139, 2941780), (278, 1470890), (556, 735445), (695, 588356), (1390, 294178), (2780, 147089)]