21606160

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{139}}^1$

素因数の和:248

約数の個数: 80

約数和(自身を含む): 53121600

約数和(自身を除く): 31515440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 67, 80, 116, 134, 139, 145, 232, 268, 278, 290, 335, 464, 536, 556, 580, 670, 695, 1072, 1112, 1160, 1340, 1390, 1943, 2224, 2320, 2680, 2780, 3886, 4031, 5360, 5560, 7772, 8062, 9313, 9715, 11120, 15544, 16124, 18626, 19430, 20155, 31088, 32248, 37252, 38860, 40310, 46565, 64496, 74504, 77720, 80620, 93130, 149008, 155440, 161240, 186260, 270077, 322480, 372520, 540154, 745040, 1080308, 1350385, 2160616, 2700770, 4321232, 5401540, 10803080, 21606160]

約数ペア:

[(1, 21606160), (2, 10803080), (4, 5401540), (5, 4321232), (8, 2700770), (10, 2160616), (16, 1350385), (20, 1080308), (29, 745040), (40, 540154), (58, 372520), (67, 322480), (80, 270077), (116, 186260), (134, 161240), (139, 155440), (145, 149008), (232, 93130), (268, 80620), (278, 77720), (290, 74504), (335, 64496), (464, 46565), (536, 40310), (556, 38860), (580, 37252), (670, 32248), (695, 31088), (1072, 20155), (1112, 19430), (1160, 18626), (1340, 16124), (1390, 15544), (1943, 11120), (2224, 9715), (2320, 9313), (2680, 8062), (2780, 7772), (3886, 5560), (4031, 5360)]