251661280

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^2\times {\mathrm{41}}^1\times {\mathrm{227}}^1$

素因数の和:309

約数の個数: 144

約数和(自身を含む): 662410224

約数和(自身を除く): 410748944

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 41, 52, 65, 80, 82, 104, 130, 160, 164, 169, 205, 208, 227, 260, 328, 338, 410, 416, 454, 520, 533, 656, 676, 820, 845, 908, 1040, 1066, 1135, 1312, 1352, 1640, 1690, 1816, 2080, 2132, 2270, 2665, 2704, 2951, 3280, 3380, 3632, 4264, 4540, 5330, 5408, 5902, 6560, 6760, 6929, 7264, 8528, 9080, 9307, 10660, 11804, 13520, 13858, 14755, 17056, 18160, 18614, 21320, 23608, 27040, 27716, 29510, 34645, 36320, 37228, 38363, 42640, 46535, 47216, 55432, 59020, 69290, 74456, 76726, 85280, 93070, 94432, 110864, 118040, 120991, 138580, 148912, 153452, 186140, 191815, 221728, 236080, 241982, 277160, 297824, 306904, 372280, 383630, 472160, 483964, 554320, 604955, 613808, 744560, 767260, 967928, 1108640, 1209910, 1227616, 1489120, 1534520, 1572883, 1935856, 2419820, 3069040, 3145766, 3871712, 4839640, 6138080, 6291532, 7864415, 9679280, 12583064, 15728830, 19358560, 25166128, 31457660, 50332256, 62915320, 125830640, 251661280]

約数ペア:

[(1, 251661280), (2, 125830640), (4, 62915320), (5, 50332256), (8, 31457660), (10, 25166128), (13, 19358560), (16, 15728830), (20, 12583064), (26, 9679280), (32, 7864415), (40, 6291532), (41, 6138080), (52, 4839640), (65, 3871712), (80, 3145766), (82, 3069040), (104, 2419820), (130, 1935856), (160, 1572883), (164, 1534520), (169, 1489120), (205, 1227616), (208, 1209910), (227, 1108640), (260, 967928), (328, 767260), (338, 744560), (410, 613808), (416, 604955), (454, 554320), (520, 483964), (533, 472160), (656, 383630), (676, 372280), (820, 306904), (845, 297824), (908, 277160), (1040, 241982), (1066, 236080), (1135, 221728), (1312, 191815), (1352, 186140), (1640, 153452), (1690, 148912), (1816, 138580), (2080, 120991), (2132, 118040), (2270, 110864), (2665, 94432), (2704, 93070), (2951, 85280), (3280, 76726), (3380, 74456), (3632, 69290), (4264, 59020), (4540, 55432), (5330, 47216), (5408, 46535), (5902, 42640), (6560, 38363), (6760, 37228), (6929, 36320), (7264, 34645), (8528, 29510), (9080, 27716), (9307, 27040), (10660, 23608), (11804, 21320), (13520, 18614), (13858, 18160), (14755, 17056)]