20271820

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{547}}^1$

素因数の和:682

約数の個数: 48

約数和(自身を含む): 45571680

約数和(自身を除く): 25299860

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 109, 170, 218, 340, 436, 545, 547, 1090, 1094, 1853, 2180, 2188, 2735, 3706, 5470, 7412, 9265, 9299, 10940, 18530, 18598, 37060, 37196, 46495, 59623, 92990, 119246, 185980, 238492, 298115, 596230, 1013591, 1192460, 2027182, 4054364, 5067955, 10135910, 20271820]

約数ペア:

[(1, 20271820), (2, 10135910), (4, 5067955), (5, 4054364), (10, 2027182), (17, 1192460), (20, 1013591), (34, 596230), (68, 298115), (85, 238492), (109, 185980), (170, 119246), (218, 92990), (340, 59623), (436, 46495), (545, 37196), (547, 37060), (1090, 18598), (1094, 18530), (1853, 10940), (2180, 9299), (2188, 9265), (2735, 7412), (3706, 5470)]