19978508

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{97}}^1\times {\mathrm{151}}^1$

素因数の和:294

約数の個数: 48

約数和(自身を含む): 40040448

約数和(自身を除く): 20061940

約数列:

[1, 2, 4, 11, 22, 31, 44, 62, 97, 124, 151, 194, 302, 341, 388, 604, 682, 1067, 1364, 1661, 2134, 3007, 3322, 4268, 4681, 6014, 6644, 9362, 12028, 14647, 18724, 29294, 33077, 51491, 58588, 66154, 102982, 132308, 161117, 205964, 322234, 454057, 644468, 908114, 1816228, 4994627, 9989254, 19978508]

約数ペア:

[(1, 19978508), (2, 9989254), (4, 4994627), (11, 1816228), (22, 908114), (31, 644468), (44, 454057), (62, 322234), (97, 205964), (124, 161117), (151, 132308), (194, 102982), (302, 66154), (341, 58588), (388, 51491), (604, 33077), (682, 29294), (1067, 18724), (1364, 14647), (1661, 12028), (2134, 9362), (3007, 6644), (3322, 6014), (4268, 4681)]