21167150120

素因数分解:

$2^3\times 5^1\times {\mathrm{661}}^1\times {\mathrm{800573}}^1$

素因数の和:801245

約数の個数: 32

約数和(自身を含む): 47698198920

約数和(自身を除く): 26531048800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 661, 1322, 2644, 3305, 5288, 6610, 13220, 26440, 800573, 1601146, 3202292, 4002865, 6404584, 8005730, 16011460, 32022920, 529178753, 1058357506, 2116715012, 2645893765, 4233430024, 5291787530, 10583575060, 21167150120]

約数ペア:

[(1, 21167150120), (2, 10583575060), (4, 5291787530), (5, 4233430024), (8, 2645893765), (10, 2116715012), (20, 1058357506), (40, 529178753), (661, 32022920), (1322, 16011460), (2644, 8005730), (3305, 6404584), (5288, 4002865), (6610, 3202292), (13220, 1601146), (26440, 800573)]