20215347920

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{79}}^2\times {\mathrm{2131}}^1$

素因数の和:2321

約数の個数: 120

約数和(自身を含む): 50132103840

約数和(自身を除く): 29916755920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 79, 80, 95, 152, 158, 190, 304, 316, 380, 395, 632, 760, 790, 1264, 1501, 1520, 1580, 2131, 3002, 3160, 4262, 6004, 6241, 6320, 7505, 8524, 10655, 12008, 12482, 15010, 17048, 21310, 24016, 24964, 30020, 31205, 34096, 40489, 42620, 49928, 60040, 62410, 80978, 85240, 99856, 118579, 120080, 124820, 161956, 168349, 170480, 202445, 237158, 249640, 323912, 336698, 404890, 474316, 499280, 592895, 647824, 673396, 809780, 841745, 948632, 1185790, 1346792, 1619560, 1683490, 1897264, 2371580, 2693584, 3198631, 3239120, 3366980, 4743160, 6397262, 6733960, 9486320, 12794524, 13299571, 13467920, 15993155, 25589048, 26599142, 31986310, 51178096, 53198284, 63972620, 66497855, 106396568, 127945240, 132995710, 212793136, 252691849, 255890480, 265991420, 505383698, 531982840, 1010767396, 1063965680, 1263459245, 2021534792, 2526918490, 4043069584, 5053836980, 10107673960, 20215347920]

約数ペア:

[(1, 20215347920), (2, 10107673960), (4, 5053836980), (5, 4043069584), (8, 2526918490), (10, 2021534792), (16, 1263459245), (19, 1063965680), (20, 1010767396), (38, 531982840), (40, 505383698), (76, 265991420), (79, 255890480), (80, 252691849), (95, 212793136), (152, 132995710), (158, 127945240), (190, 106396568), (304, 66497855), (316, 63972620), (380, 53198284), (395, 51178096), (632, 31986310), (760, 26599142), (790, 25589048), (1264, 15993155), (1501, 13467920), (1520, 13299571), (1580, 12794524), (2131, 9486320), (3002, 6733960), (3160, 6397262), (4262, 4743160), (6004, 3366980), (6241, 3239120), (6320, 3198631), (7505, 2693584), (8524, 2371580), (10655, 1897264), (12008, 1683490), (12482, 1619560), (15010, 1346792), (17048, 1185790), (21310, 948632), (24016, 841745), (24964, 809780), (30020, 673396), (31205, 647824), (34096, 592895), (40489, 499280), (42620, 474316), (49928, 404890), (60040, 336698), (62410, 323912), (80978, 249640), (85240, 237158), (99856, 202445), (118579, 170480), (120080, 168349), (124820, 161956)]