21180440

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^2$

素因数の和:121

約数の個数: 96

約数和(自身を含む): 53622000

約数和(自身を除く): 32441560

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 29, 31, 38, 40, 58, 62, 76, 95, 116, 124, 145, 152, 155, 190, 232, 248, 290, 310, 380, 551, 580, 589, 620, 760, 899, 961, 1102, 1160, 1178, 1240, 1798, 1922, 2204, 2356, 2755, 2945, 3596, 3844, 4408, 4495, 4712, 4805, 5510, 5890, 7192, 7688, 8990, 9610, 11020, 11780, 17081, 17980, 18259, 19220, 22040, 23560, 27869, 34162, 35960, 36518, 38440, 55738, 68324, 73036, 85405, 91295, 111476, 136648, 139345, 146072, 170810, 182590, 222952, 278690, 341620, 365180, 529511, 557380, 683240, 730360, 1059022, 1114760, 2118044, 2647555, 4236088, 5295110, 10590220, 21180440]

約数ペア:

[(1, 21180440), (2, 10590220), (4, 5295110), (5, 4236088), (8, 2647555), (10, 2118044), (19, 1114760), (20, 1059022), (29, 730360), (31, 683240), (38, 557380), (40, 529511), (58, 365180), (62, 341620), (76, 278690), (95, 222952), (116, 182590), (124, 170810), (145, 146072), (152, 139345), (155, 136648), (190, 111476), (232, 91295), (248, 85405), (290, 73036), (310, 68324), (380, 55738), (551, 38440), (580, 36518), (589, 35960), (620, 34162), (760, 27869), (899, 23560), (961, 22040), (1102, 19220), (1160, 18259), (1178, 17980), (1240, 17081), (1798, 11780), (1922, 11020), (2204, 9610), (2356, 8990), (2755, 7688), (2945, 7192), (3596, 5890), (3844, 5510), (4408, 4805), (4495, 4712)]