19977608

素因数分解:

$2^3\times 7^1\times {\mathrm{53}}^2\times {\mathrm{127}}^1$

素因数の和:246

約数の個数: 48

約数和(自身を含む): 43975680

約数和(自身を除く): 23998072

約数列:

[1, 2, 4, 7, 8, 14, 28, 53, 56, 106, 127, 212, 254, 371, 424, 508, 742, 889, 1016, 1484, 1778, 2809, 2968, 3556, 5618, 6731, 7112, 11236, 13462, 19663, 22472, 26924, 39326, 47117, 53848, 78652, 94234, 157304, 188468, 356743, 376936, 713486, 1426972, 2497201, 2853944, 4994402, 9988804, 19977608]

約数ペア:

[(1, 19977608), (2, 9988804), (4, 4994402), (7, 2853944), (8, 2497201), (14, 1426972), (28, 713486), (53, 376936), (56, 356743), (106, 188468), (127, 157304), (212, 94234), (254, 78652), (371, 53848), (424, 47117), (508, 39326), (742, 26924), (889, 22472), (1016, 19663), (1484, 13462), (1778, 11236), (2809, 7112), (2968, 6731), (3556, 5618)]