28540520

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{8017}}^1$

素因数の和:8117

約数の個数: 32

約数和(自身を含む): 64945800

約数和(自身を除く): 36405280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 8017, 16034, 32068, 40085, 64136, 80170, 160340, 320680, 713513, 1427026, 2854052, 3567565, 5708104, 7135130, 14270260, 28540520]

約数ペア:

[(1, 28540520), (2, 14270260), (4, 7135130), (5, 5708104), (8, 3567565), (10, 2854052), (20, 1427026), (40, 713513), (89, 320680), (178, 160340), (356, 80170), (445, 64136), (712, 40085), (890, 32068), (1780, 16034), (3560, 8017)]