21116680

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{40609}}^1$

素因数の和:40633

約数の個数: 32

約数和(自身を含む): 51168600

約数和(自身を除く): 30051920

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 40609, 81218, 162436, 203045, 324872, 406090, 527917, 812180, 1055834, 1624360, 2111668, 2639585, 4223336, 5279170, 10558340, 21116680]

約数ペア:

[(1, 21116680), (2, 10558340), (4, 5279170), (5, 4223336), (8, 2639585), (10, 2111668), (13, 1624360), (20, 1055834), (26, 812180), (40, 527917), (52, 406090), (65, 324872), (104, 203045), (130, 162436), (260, 81218), (520, 40609)]