81655640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{16871}}^1$

素因数の和:16904

約数の個数: 48

約数和(自身を含む): 201957840

約数和(自身を除く): 120302200

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 121, 220, 242, 440, 484, 605, 968, 1210, 2420, 4840, 16871, 33742, 67484, 84355, 134968, 168710, 185581, 337420, 371162, 674840, 742324, 927905, 1484648, 1855810, 2041391, 3711620, 4082782, 7423240, 8165564, 10206955, 16331128, 20413910, 40827820, 81655640]

約数ペア:

[(1, 81655640), (2, 40827820), (4, 20413910), (5, 16331128), (8, 10206955), (10, 8165564), (11, 7423240), (20, 4082782), (22, 3711620), (40, 2041391), (44, 1855810), (55, 1484648), (88, 927905), (110, 742324), (121, 674840), (220, 371162), (242, 337420), (440, 185581), (484, 168710), (605, 134968), (968, 84355), (1210, 67484), (2420, 33742), (4840, 16871)]