21284880

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{131}}^1\times {\mathrm{677}}^1$

素因数の和:824

約数の個数: 80

約数和(自身を含む): 66585024

約数和(自身を除く): 45300144

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 131, 240, 262, 393, 524, 655, 677, 786, 1048, 1310, 1354, 1572, 1965, 2031, 2096, 2620, 2708, 3144, 3385, 3930, 4062, 5240, 5416, 6288, 6770, 7860, 8124, 10155, 10480, 10832, 13540, 15720, 16248, 20310, 27080, 31440, 32496, 40620, 54160, 81240, 88687, 162480, 177374, 266061, 354748, 443435, 532122, 709496, 886870, 1064244, 1330305, 1418992, 1773740, 2128488, 2660610, 3547480, 4256976, 5321220, 7094960, 10642440, 21284880]

約数ペア:

[(1, 21284880), (2, 10642440), (3, 7094960), (4, 5321220), (5, 4256976), (6, 3547480), (8, 2660610), (10, 2128488), (12, 1773740), (15, 1418992), (16, 1330305), (20, 1064244), (24, 886870), (30, 709496), (40, 532122), (48, 443435), (60, 354748), (80, 266061), (120, 177374), (131, 162480), (240, 88687), (262, 81240), (393, 54160), (524, 40620), (655, 32496), (677, 31440), (786, 27080), (1048, 20310), (1310, 16248), (1354, 15720), (1572, 13540), (1965, 10832), (2031, 10480), (2096, 10155), (2620, 8124), (2708, 7860), (3144, 6770), (3385, 6288), (3930, 5416), (4062, 5240)]