858678020

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{20731}}^1$

素因数の和:20868

約数の個数: 48

約数和(自身を含む): 1915636800

約数和(自身を除く): 1056958780

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 109, 190, 218, 380, 436, 545, 1090, 2071, 2180, 4142, 8284, 10355, 20710, 20731, 41420, 41462, 82924, 103655, 207310, 393889, 414620, 787778, 1575556, 1969445, 2259679, 3938890, 4519358, 7877780, 9038716, 11298395, 22596790, 42933901, 45193580, 85867802, 171735604, 214669505, 429339010, 858678020]

約数ペア:

[(1, 858678020), (2, 429339010), (4, 214669505), (5, 171735604), (10, 85867802), (19, 45193580), (20, 42933901), (38, 22596790), (76, 11298395), (95, 9038716), (109, 7877780), (190, 4519358), (218, 3938890), (380, 2259679), (436, 1969445), (545, 1575556), (1090, 787778), (2071, 414620), (2180, 393889), (4142, 207310), (8284, 103655), (10355, 82924), (20710, 41462), (20731, 41420)]