20409770

素因数分解:

$2^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{97}}^1\times {\mathrm{397}}^1$

素因数の和:554

約数の個数: 32

約数和(自身を含む): 37911888

約数和(自身を除く): 17502118

約数列:

[1, 2, 5, 10, 53, 97, 106, 194, 265, 397, 485, 530, 794, 970, 1985, 3970, 5141, 10282, 21041, 25705, 38509, 42082, 51410, 77018, 105205, 192545, 210410, 385090, 2040977, 4081954, 10204885, 20409770]

約数ペア:

[(1, 20409770), (2, 10204885), (5, 4081954), (10, 2040977), (53, 385090), (97, 210410), (106, 192545), (194, 105205), (265, 77018), (397, 51410), (485, 42082), (530, 38509), (794, 25705), (970, 21041), (1985, 10282), (3970, 5141)]