20983984

素因数分解:

$2^4\times 7^1\times {\mathrm{17}}^1\times {\mathrm{103}}^1\times {\mathrm{107}}^1$

素因数の和:242

約数の個数: 80

約数和(自身を含む): 50139648

約数和(自身を除く): 29155664

約数列:

[1, 2, 4, 7, 8, 14, 16, 17, 28, 34, 56, 68, 103, 107, 112, 119, 136, 206, 214, 238, 272, 412, 428, 476, 721, 749, 824, 856, 952, 1442, 1498, 1648, 1712, 1751, 1819, 1904, 2884, 2996, 3502, 3638, 5768, 5992, 7004, 7276, 11021, 11536, 11984, 12257, 12733, 14008, 14552, 22042, 24514, 25466, 28016, 29104, 44084, 49028, 50932, 77147, 88168, 98056, 101864, 154294, 176336, 187357, 196112, 203728, 308588, 374714, 617176, 749428, 1234352, 1311499, 1498856, 2622998, 2997712, 5245996, 10491992, 20983984]

約数ペア:

[(1, 20983984), (2, 10491992), (4, 5245996), (7, 2997712), (8, 2622998), (14, 1498856), (16, 1311499), (17, 1234352), (28, 749428), (34, 617176), (56, 374714), (68, 308588), (103, 203728), (107, 196112), (112, 187357), (119, 176336), (136, 154294), (206, 101864), (214, 98056), (238, 88168), (272, 77147), (412, 50932), (428, 49028), (476, 44084), (721, 29104), (749, 28016), (824, 25466), (856, 24514), (952, 22042), (1442, 14552), (1498, 14008), (1648, 12733), (1712, 12257), (1751, 11984), (1819, 11536), (1904, 11021), (2884, 7276), (2996, 7004), (3502, 5992), (3638, 5768)]