21895640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^2\times {\mathrm{41}}^1\times {\mathrm{79}}^1$

素因数の和:157

約数の個数: 96

約数和(自身を含む): 55339200

約数和(自身を除く): 33443560

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 41, 52, 65, 79, 82, 104, 130, 158, 164, 169, 205, 260, 316, 328, 338, 395, 410, 520, 533, 632, 676, 790, 820, 845, 1027, 1066, 1352, 1580, 1640, 1690, 2054, 2132, 2665, 3160, 3239, 3380, 4108, 4264, 5135, 5330, 6478, 6760, 6929, 8216, 10270, 10660, 12956, 13351, 13858, 16195, 20540, 21320, 25912, 26702, 27716, 32390, 34645, 41080, 42107, 53404, 55432, 64780, 66755, 69290, 84214, 106808, 129560, 133510, 138580, 168428, 210535, 267020, 277160, 336856, 421070, 534040, 547391, 842140, 1094782, 1684280, 2189564, 2736955, 4379128, 5473910, 10947820, 21895640]

約数ペア:

[(1, 21895640), (2, 10947820), (4, 5473910), (5, 4379128), (8, 2736955), (10, 2189564), (13, 1684280), (20, 1094782), (26, 842140), (40, 547391), (41, 534040), (52, 421070), (65, 336856), (79, 277160), (82, 267020), (104, 210535), (130, 168428), (158, 138580), (164, 133510), (169, 129560), (205, 106808), (260, 84214), (316, 69290), (328, 66755), (338, 64780), (395, 55432), (410, 53404), (520, 42107), (533, 41080), (632, 34645), (676, 32390), (790, 27716), (820, 26702), (845, 25912), (1027, 21320), (1066, 20540), (1352, 16195), (1580, 13858), (1640, 13351), (1690, 12956), (2054, 10660), (2132, 10270), (2665, 8216), (3160, 6929), (3239, 6760), (3380, 6478), (4108, 5330), (4264, 5135)]