28388180

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{23269}}^1$

素因数の和:23339

約数の個数: 24

約数和(自身を含む): 60595080

約数和(自身を除く): 32206900

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 23269, 46538, 93076, 116345, 232690, 465380, 1419409, 2838818, 5677636, 7097045, 14194090, 28388180]

約数ペア:

[(1, 28388180), (2, 14194090), (4, 7097045), (5, 5677636), (10, 2838818), (20, 1419409), (61, 465380), (122, 232690), (244, 116345), (305, 93076), (610, 46538), (1220, 23269)]