19921840

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{277}}^1$

素因数の和:350

約数の個数: 80

約数和(自身を含む): 49639680

約数和(自身を除く): 29717840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 31, 40, 58, 62, 80, 116, 124, 145, 155, 232, 248, 277, 290, 310, 464, 496, 554, 580, 620, 899, 1108, 1160, 1240, 1385, 1798, 2216, 2320, 2480, 2770, 3596, 4432, 4495, 5540, 7192, 8033, 8587, 8990, 11080, 14384, 16066, 17174, 17980, 22160, 32132, 34348, 35960, 40165, 42935, 64264, 68696, 71920, 80330, 85870, 128528, 137392, 160660, 171740, 249023, 321320, 343480, 498046, 642640, 686960, 996092, 1245115, 1992184, 2490230, 3984368, 4980460, 9960920, 19921840]

約数ペア:

[(1, 19921840), (2, 9960920), (4, 4980460), (5, 3984368), (8, 2490230), (10, 1992184), (16, 1245115), (20, 996092), (29, 686960), (31, 642640), (40, 498046), (58, 343480), (62, 321320), (80, 249023), (116, 171740), (124, 160660), (145, 137392), (155, 128528), (232, 85870), (248, 80330), (277, 71920), (290, 68696), (310, 64264), (464, 42935), (496, 40165), (554, 35960), (580, 34348), (620, 32132), (899, 22160), (1108, 17980), (1160, 17174), (1240, 16066), (1385, 14384), (1798, 11080), (2216, 8990), (2320, 8587), (2480, 8033), (2770, 7192), (3596, 5540), (4432, 4495)]