19940558

素因数分解:

$2^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{131}}^1$

素因数の和:209

約数の個数: 48

約数和(自身を含む): 36024912

約数和(自身を除く): 16084354

約数列:

[1, 2, 11, 17, 22, 34, 37, 74, 121, 131, 187, 242, 262, 374, 407, 629, 814, 1258, 1441, 2057, 2227, 2882, 4114, 4454, 4477, 4847, 6919, 8954, 9694, 13838, 15851, 24497, 31702, 48994, 53317, 76109, 82399, 106634, 152218, 164798, 269467, 538934, 586487, 906389, 1172974, 1812778, 9970279, 19940558]

約数ペア:

[(1, 19940558), (2, 9970279), (11, 1812778), (17, 1172974), (22, 906389), (34, 586487), (37, 538934), (74, 269467), (121, 164798), (131, 152218), (187, 106634), (242, 82399), (262, 76109), (374, 53317), (407, 48994), (629, 31702), (814, 24497), (1258, 15851), (1441, 13838), (2057, 9694), (2227, 8954), (2882, 6919), (4114, 4847), (4454, 4477)]