20887910

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{197}}^1\times {\mathrm{461}}^1$

素因数の和:688

約数の個数: 32

約数和(自身を含む): 39517632

約数和(自身を除く): 18629722

約数列:

[1, 2, 5, 10, 23, 46, 115, 197, 230, 394, 461, 922, 985, 1970, 2305, 4531, 4610, 9062, 10603, 21206, 22655, 45310, 53015, 90817, 106030, 181634, 454085, 908170, 2088791, 4177582, 10443955, 20887910]

約数ペア:

[(1, 20887910), (2, 10443955), (5, 4177582), (10, 2088791), (23, 908170), (46, 454085), (115, 181634), (197, 106030), (230, 90817), (394, 53015), (461, 45310), (922, 22655), (985, 21206), (1970, 10603), (2305, 9062), (4531, 4610)]