20278120

素因数分解:

$2^3\times 5^1\times {\mathrm{157}}^1\times {\mathrm{3229}}^1$

素因数の和:3397

約数の個数: 32

約数和(自身を含む): 45930600

約数和(自身を除く): 25652480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 157, 314, 628, 785, 1256, 1570, 3140, 3229, 6280, 6458, 12916, 16145, 25832, 32290, 64580, 129160, 506953, 1013906, 2027812, 2534765, 4055624, 5069530, 10139060, 20278120]

約数ペア:

[(1, 20278120), (2, 10139060), (4, 5069530), (5, 4055624), (8, 2534765), (10, 2027812), (20, 1013906), (40, 506953), (157, 129160), (314, 64580), (628, 32290), (785, 25832), (1256, 16145), (1570, 12916), (3140, 6458), (3229, 6280)]