81978820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{53233}}^1$

素因数の和:53260

約数の個数: 48

約数和(自身を含む): 214639488

約数和(自身を除く): 132660668

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 53233, 106466, 212932, 266165, 372631, 532330, 585563, 745262, 1064660, 1171126, 1490524, 1863155, 2342252, 2927815, 3726310, 4098941, 5855630, 7452620, 8197882, 11711260, 16395764, 20494705, 40989410, 81978820]

約数ペア:

[(1, 81978820), (2, 40989410), (4, 20494705), (5, 16395764), (7, 11711260), (10, 8197882), (11, 7452620), (14, 5855630), (20, 4098941), (22, 3726310), (28, 2927815), (35, 2342252), (44, 1863155), (55, 1490524), (70, 1171126), (77, 1064660), (110, 745262), (140, 585563), (154, 532330), (220, 372631), (308, 266165), (385, 212932), (770, 106466), (1540, 53233)]