20880720

素因数分解:

$2^4\times 3^3\times 5^1\times 7^1\times {\mathrm{1381}}^1$

素因数の和:1410

約数の個数: 160

約数和(自身を含む): 82256640

約数和(自身を除く): 61375920

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 27, 28, 30, 35, 36, 40, 42, 45, 48, 54, 56, 60, 63, 70, 72, 80, 84, 90, 105, 108, 112, 120, 126, 135, 140, 144, 168, 180, 189, 210, 216, 240, 252, 270, 280, 315, 336, 360, 378, 420, 432, 504, 540, 560, 630, 720, 756, 840, 945, 1008, 1080, 1260, 1381, 1512, 1680, 1890, 2160, 2520, 2762, 3024, 3780, 4143, 5040, 5524, 6905, 7560, 8286, 9667, 11048, 12429, 13810, 15120, 16572, 19334, 20715, 22096, 24858, 27620, 29001, 33144, 37287, 38668, 41430, 48335, 49716, 55240, 58002, 62145, 66288, 74574, 77336, 82860, 87003, 96670, 99432, 110480, 116004, 124290, 145005, 149148, 154672, 165720, 174006, 186435, 193340, 198864, 232008, 248580, 261009, 290010, 298296, 331440, 348012, 372870, 386680, 435015, 464016, 497160, 522018, 580020, 596592, 696024, 745740, 773360, 870030, 994320, 1044036, 1160040, 1305045, 1392048, 1491480, 1740060, 2088072, 2320080, 2610090, 2982960, 3480120, 4176144, 5220180, 6960240, 10440360, 20880720]

約数ペア:

[(1, 20880720), (2, 10440360), (3, 6960240), (4, 5220180), (5, 4176144), (6, 3480120), (7, 2982960), (8, 2610090), (9, 2320080), (10, 2088072), (12, 1740060), (14, 1491480), (15, 1392048), (16, 1305045), (18, 1160040), (20, 1044036), (21, 994320), (24, 870030), (27, 773360), (28, 745740), (30, 696024), (35, 596592), (36, 580020), (40, 522018), (42, 497160), (45, 464016), (48, 435015), (54, 386680), (56, 372870), (60, 348012), (63, 331440), (70, 298296), (72, 290010), (80, 261009), (84, 248580), (90, 232008), (105, 198864), (108, 193340), (112, 186435), (120, 174006), (126, 165720), (135, 154672), (140, 149148), (144, 145005), (168, 124290), (180, 116004), (189, 110480), (210, 99432), (216, 96670), (240, 87003), (252, 82860), (270, 77336), (280, 74574), (315, 66288), (336, 62145), (360, 58002), (378, 55240), (420, 49716), (432, 48335), (504, 41430), (540, 38668), (560, 37287), (630, 33144), (720, 29001), (756, 27620), (840, 24858), (945, 22096), (1008, 20715), (1080, 19334), (1260, 16572), (1381, 15120), (1512, 13810), (1680, 12429), (1890, 11048), (2160, 9667), (2520, 8286), (2762, 7560), (3024, 6905), (3780, 5524), (4143, 5040)]