19905740

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1\times {\mathrm{211}}^1$

素因数の和:362

約数の個数: 48

約数和(自身を含む): 43273440

約数和(自身を除く): 23367700

約数列:

[1, 2, 4, 5, 10, 20, 53, 89, 106, 178, 211, 212, 265, 356, 422, 445, 530, 844, 890, 1055, 1060, 1780, 2110, 4220, 4717, 9434, 11183, 18779, 18868, 22366, 23585, 37558, 44732, 47170, 55915, 75116, 93895, 94340, 111830, 187790, 223660, 375580, 995287, 1990574, 3981148, 4976435, 9952870, 19905740]

約数ペア:

[(1, 19905740), (2, 9952870), (4, 4976435), (5, 3981148), (10, 1990574), (20, 995287), (53, 375580), (89, 223660), (106, 187790), (178, 111830), (211, 94340), (212, 93895), (265, 75116), (356, 55915), (422, 47170), (445, 44732), (530, 37558), (844, 23585), (890, 22366), (1055, 18868), (1060, 18779), (1780, 11183), (2110, 9434), (4220, 4717)]