20581780

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{101}}^1\times {\mathrm{443}}^1$

素因数の和:576

約数の個数: 48

約数和(自身を含む): 45650304

約数和(自身を除く): 25068524

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 101, 115, 202, 230, 404, 443, 460, 505, 886, 1010, 1772, 2020, 2215, 2323, 4430, 4646, 8860, 9292, 10189, 11615, 20378, 23230, 40756, 44743, 46460, 50945, 89486, 101890, 178972, 203780, 223715, 447430, 894860, 1029089, 2058178, 4116356, 5145445, 10290890, 20581780]

約数ペア:

[(1, 20581780), (2, 10290890), (4, 5145445), (5, 4116356), (10, 2058178), (20, 1029089), (23, 894860), (46, 447430), (92, 223715), (101, 203780), (115, 178972), (202, 101890), (230, 89486), (404, 50945), (443, 46460), (460, 44743), (505, 40756), (886, 23230), (1010, 20378), (1772, 11615), (2020, 10189), (2215, 9292), (2323, 8860), (4430, 4646)]