28778420

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{130811}}^1$

素因数の和:130831

約数の個数: 24

約数和(自身を含む): 65929248

約数和(自身を除く): 37150828

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 130811, 261622, 523244, 654055, 1308110, 1438921, 2616220, 2877842, 5755684, 7194605, 14389210, 28778420]

約数ペア:

[(1, 28778420), (2, 14389210), (4, 7194605), (5, 5755684), (10, 2877842), (11, 2616220), (20, 1438921), (22, 1308110), (44, 654055), (55, 523244), (110, 261622), (220, 130811)]