21990360

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{557}}^1$

素因数の和:625

約数の個数: 128

約数和(自身を含む): 77137920

約数和(自身を除く): 55147560

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 47, 56, 60, 70, 84, 94, 105, 120, 140, 141, 168, 188, 210, 235, 280, 282, 329, 376, 420, 470, 557, 564, 658, 705, 840, 940, 987, 1114, 1128, 1316, 1410, 1645, 1671, 1880, 1974, 2228, 2632, 2785, 2820, 3290, 3342, 3899, 3948, 4456, 4935, 5570, 5640, 6580, 6684, 7798, 7896, 8355, 9870, 11140, 11697, 13160, 13368, 15596, 16710, 19495, 19740, 22280, 23394, 26179, 31192, 33420, 38990, 39480, 46788, 52358, 58485, 66840, 77980, 78537, 93576, 104716, 116970, 130895, 155960, 157074, 183253, 209432, 233940, 261790, 314148, 366506, 392685, 467880, 523580, 549759, 628296, 733012, 785370, 916265, 1047160, 1099518, 1466024, 1570740, 1832530, 2199036, 2748795, 3141480, 3665060, 4398072, 5497590, 7330120, 10995180, 21990360]

約数ペア:

[(1, 21990360), (2, 10995180), (3, 7330120), (4, 5497590), (5, 4398072), (6, 3665060), (7, 3141480), (8, 2748795), (10, 2199036), (12, 1832530), (14, 1570740), (15, 1466024), (20, 1099518), (21, 1047160), (24, 916265), (28, 785370), (30, 733012), (35, 628296), (40, 549759), (42, 523580), (47, 467880), (56, 392685), (60, 366506), (70, 314148), (84, 261790), (94, 233940), (105, 209432), (120, 183253), (140, 157074), (141, 155960), (168, 130895), (188, 116970), (210, 104716), (235, 93576), (280, 78537), (282, 77980), (329, 66840), (376, 58485), (420, 52358), (470, 46788), (557, 39480), (564, 38990), (658, 33420), (705, 31192), (840, 26179), (940, 23394), (987, 22280), (1114, 19740), (1128, 19495), (1316, 16710), (1410, 15596), (1645, 13368), (1671, 13160), (1880, 11697), (1974, 11140), (2228, 9870), (2632, 8355), (2785, 7896), (2820, 7798), (3290, 6684), (3342, 6580), (3899, 5640), (3948, 5570), (4456, 4935)]