820919990

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{240739}}^1$

素因数の和:240788

約数の個数: 32

約数和(自身を含む): 1663994880

約数和(自身を除く): 843074890

約数列:

[1, 2, 5, 10, 11, 22, 31, 55, 62, 110, 155, 310, 341, 682, 1705, 3410, 240739, 481478, 1203695, 2407390, 2648129, 5296258, 7462909, 13240645, 14925818, 26481290, 37314545, 74629090, 82091999, 164183998, 410459995, 820919990]

約数ペア:

[(1, 820919990), (2, 410459995), (5, 164183998), (10, 82091999), (11, 74629090), (22, 37314545), (31, 26481290), (55, 14925818), (62, 13240645), (110, 7462909), (155, 5296258), (310, 2648129), (341, 2407390), (682, 1203695), (1705, 481478), (3410, 240739)]