21978770

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{199807}}^1$

素因数の和:199825

約数の個数: 16

約数和(自身を含む): 43158528

約数和(自身を除く): 21179758

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 199807, 399614, 999035, 1998070, 2197877, 4395754, 10989385, 21978770]

約数ペア:

[(1, 21978770), (2, 10989385), (5, 4395754), (10, 2197877), (11, 1998070), (22, 999035), (55, 399614), (110, 199807)]