81192220

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^2\times {\mathrm{1091}}^1$

素因数の和:1222

約数の個数: 36

約数和(自身を含む): 173503512

約数和(自身を除く): 92311292

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1091, 1220, 2182, 3721, 4364, 5455, 7442, 10910, 14884, 18605, 21820, 37210, 66551, 74420, 133102, 266204, 332755, 665510, 1331020, 4059611, 8119222, 16238444, 20298055, 40596110, 81192220]

約数ペア:

[(1, 81192220), (2, 40596110), (4, 20298055), (5, 16238444), (10, 8119222), (20, 4059611), (61, 1331020), (122, 665510), (244, 332755), (305, 266204), (610, 133102), (1091, 74420), (1220, 66551), (2182, 37210), (3721, 21820), (4364, 18605), (5455, 14884), (7442, 10910)]