20915080

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{101}}^1\times {\mathrm{167}}^1$

素因数の和:310

約数の個数: 64

約数和(自身を含む): 49351680

約数和(自身を除く): 28436600

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 101, 124, 155, 167, 202, 248, 310, 334, 404, 505, 620, 668, 808, 835, 1010, 1240, 1336, 1670, 2020, 3131, 3340, 4040, 5177, 6262, 6680, 10354, 12524, 15655, 16867, 20708, 25048, 25885, 31310, 33734, 41416, 51770, 62620, 67468, 84335, 103540, 125240, 134936, 168670, 207080, 337340, 522877, 674680, 1045754, 2091508, 2614385, 4183016, 5228770, 10457540, 20915080]

約数ペア:

[(1, 20915080), (2, 10457540), (4, 5228770), (5, 4183016), (8, 2614385), (10, 2091508), (20, 1045754), (31, 674680), (40, 522877), (62, 337340), (101, 207080), (124, 168670), (155, 134936), (167, 125240), (202, 103540), (248, 84335), (310, 67468), (334, 62620), (404, 51770), (505, 41416), (620, 33734), (668, 31310), (808, 25885), (835, 25048), (1010, 20708), (1240, 16867), (1336, 15655), (1670, 12524), (2020, 10354), (3131, 6680), (3340, 6262), (4040, 5177)]