20120784920

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{335123}}^1$

素因数の和:335232

約数の個数: 64

約数和(自身を含む): 48257856000

約数和(自身を除く): 28137071080

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 79, 95, 152, 158, 190, 316, 380, 395, 632, 760, 790, 1501, 1580, 3002, 3160, 6004, 7505, 12008, 15010, 30020, 60040, 335123, 670246, 1340492, 1675615, 2680984, 3351230, 6367337, 6702460, 12734674, 13404920, 25469348, 26474717, 31836685, 50938696, 52949434, 63673370, 105898868, 127346740, 132373585, 211797736, 254693480, 264747170, 503019623, 529494340, 1006039246, 1058988680, 2012078492, 2515098115, 4024156984, 5030196230, 10060392460, 20120784920]

約数ペア:

[(1, 20120784920), (2, 10060392460), (4, 5030196230), (5, 4024156984), (8, 2515098115), (10, 2012078492), (19, 1058988680), (20, 1006039246), (38, 529494340), (40, 503019623), (76, 264747170), (79, 254693480), (95, 211797736), (152, 132373585), (158, 127346740), (190, 105898868), (316, 63673370), (380, 52949434), (395, 50938696), (632, 31836685), (760, 26474717), (790, 25469348), (1501, 13404920), (1580, 12734674), (3002, 6702460), (3160, 6367337), (6004, 3351230), (7505, 2680984), (12008, 1675615), (15010, 1340492), (30020, 670246), (60040, 335123)]