21257770

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{2111}}^1$

素因数の和:2190

約数の個数: 32

約数和(自身を含む): 41057280

約数和(自身を除く): 19799510

約数列:

[1, 2, 5, 10, 19, 38, 53, 95, 106, 190, 265, 530, 1007, 2014, 2111, 4222, 5035, 10070, 10555, 21110, 40109, 80218, 111883, 200545, 223766, 401090, 559415, 1118830, 2125777, 4251554, 10628885, 21257770]

約数ペア:

[(1, 21257770), (2, 10628885), (5, 4251554), (10, 2125777), (19, 1118830), (38, 559415), (53, 401090), (95, 223766), (106, 200545), (190, 111883), (265, 80218), (530, 40109), (1007, 21110), (2014, 10555), (2111, 10070), (4222, 5035)]