81871580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{379}}^1\times {\mathrm{1543}}^1$

素因数の和:1938

約数の個数: 48

約数和(自身を含む): 197137920

約数和(自身を除く): 115266340

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 379, 758, 1516, 1543, 1895, 2653, 3086, 3790, 5306, 6172, 7580, 7715, 10612, 10801, 13265, 15430, 21602, 26530, 30860, 43204, 53060, 54005, 108010, 216020, 584797, 1169594, 2339188, 2923985, 4093579, 5847970, 8187158, 11695940, 16374316, 20467895, 40935790, 81871580]

約数ペア:

[(1, 81871580), (2, 40935790), (4, 20467895), (5, 16374316), (7, 11695940), (10, 8187158), (14, 5847970), (20, 4093579), (28, 2923985), (35, 2339188), (70, 1169594), (140, 584797), (379, 216020), (758, 108010), (1516, 54005), (1543, 53060), (1895, 43204), (2653, 30860), (3086, 26530), (3790, 21602), (5306, 15430), (6172, 13265), (7580, 10801), (7715, 10612)]