20989920

素因数分解:

$2^5\times 3^1\times 5^1\times 7^1\times {\mathrm{6247}}^1$

素因数の和:6272

約数の個数: 96

約数和(自身を含む): 75575808

約数和(自身を除く): 54585888

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 32, 35, 40, 42, 48, 56, 60, 70, 80, 84, 96, 105, 112, 120, 140, 160, 168, 210, 224, 240, 280, 336, 420, 480, 560, 672, 840, 1120, 1680, 3360, 6247, 12494, 18741, 24988, 31235, 37482, 43729, 49976, 62470, 74964, 87458, 93705, 99952, 124940, 131187, 149928, 174916, 187410, 199904, 218645, 249880, 262374, 299856, 349832, 374820, 437290, 499760, 524748, 599712, 655935, 699664, 749640, 874580, 999520, 1049496, 1311870, 1399328, 1499280, 1749160, 2098992, 2623740, 2998560, 3498320, 4197984, 5247480, 6996640, 10494960, 20989920]

約数ペア:

[(1, 20989920), (2, 10494960), (3, 6996640), (4, 5247480), (5, 4197984), (6, 3498320), (7, 2998560), (8, 2623740), (10, 2098992), (12, 1749160), (14, 1499280), (15, 1399328), (16, 1311870), (20, 1049496), (21, 999520), (24, 874580), (28, 749640), (30, 699664), (32, 655935), (35, 599712), (40, 524748), (42, 499760), (48, 437290), (56, 374820), (60, 349832), (70, 299856), (80, 262374), (84, 249880), (96, 218645), (105, 199904), (112, 187410), (120, 174916), (140, 149928), (160, 131187), (168, 124940), (210, 99952), (224, 93705), (240, 87458), (280, 74964), (336, 62470), (420, 49976), (480, 43729), (560, 37482), (672, 31235), (840, 24988), (1120, 18741), (1680, 12494), (3360, 6247)]