20920438

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{131}}^1$

素因数の和:229

約数の個数: 64

約数和(自身を含む): 42425856

約数和(自身を除く): 21505418

約数列:

[1, 2, 7, 11, 14, 17, 22, 34, 61, 77, 119, 122, 131, 154, 187, 238, 262, 374, 427, 671, 854, 917, 1037, 1309, 1342, 1441, 1834, 2074, 2227, 2618, 2882, 4454, 4697, 7259, 7991, 9394, 10087, 11407, 14518, 15589, 15982, 20174, 22814, 24497, 31178, 48994, 55937, 79849, 87901, 111874, 135847, 159698, 171479, 175802, 271694, 342958, 615307, 950929, 1230614, 1494317, 1901858, 2988634, 10460219, 20920438]

約数ペア:

[(1, 20920438), (2, 10460219), (7, 2988634), (11, 1901858), (14, 1494317), (17, 1230614), (22, 950929), (34, 615307), (61, 342958), (77, 271694), (119, 175802), (122, 171479), (131, 159698), (154, 135847), (187, 111874), (238, 87901), (262, 79849), (374, 55937), (427, 48994), (671, 31178), (854, 24497), (917, 22814), (1037, 20174), (1309, 15982), (1342, 15589), (1441, 14518), (1834, 11407), (2074, 10087), (2227, 9394), (2618, 7991), (2882, 7259), (4454, 4697)]