21302420

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{919}}^1$

素因数の和:1008

約数の個数: 48

約数和(自身を含む): 47913600

約数和(自身を除く): 26611180

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 61, 76, 95, 122, 190, 244, 305, 380, 610, 919, 1159, 1220, 1838, 2318, 3676, 4595, 4636, 5795, 9190, 11590, 17461, 18380, 23180, 34922, 56059, 69844, 87305, 112118, 174610, 224236, 280295, 349220, 560590, 1065121, 1121180, 2130242, 4260484, 5325605, 10651210, 21302420]

約数ペア:

[(1, 21302420), (2, 10651210), (4, 5325605), (5, 4260484), (10, 2130242), (19, 1121180), (20, 1065121), (38, 560590), (61, 349220), (76, 280295), (95, 224236), (122, 174610), (190, 112118), (244, 87305), (305, 69844), (380, 56059), (610, 34922), (919, 23180), (1159, 18380), (1220, 17461), (1838, 11590), (2318, 9190), (3676, 5795), (4595, 4636)]