221654960

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1\times {\mathrm{643}}^1$

素因数の和:826

約数の個数: 80

約数和(自身を含む): 536632320

約数和(自身を除く): 314977360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 139, 155, 248, 278, 310, 496, 556, 620, 643, 695, 1112, 1240, 1286, 1390, 2224, 2480, 2572, 2780, 3215, 4309, 5144, 5560, 6430, 8618, 10288, 11120, 12860, 17236, 19933, 21545, 25720, 34472, 39866, 43090, 51440, 68944, 79732, 86180, 89377, 99665, 159464, 172360, 178754, 199330, 318928, 344720, 357508, 398660, 446885, 715016, 797320, 893770, 1430032, 1594640, 1787540, 2770687, 3575080, 5541374, 7150160, 11082748, 13853435, 22165496, 27706870, 44330992, 55413740, 110827480, 221654960]

約数ペア:

[(1, 221654960), (2, 110827480), (4, 55413740), (5, 44330992), (8, 27706870), (10, 22165496), (16, 13853435), (20, 11082748), (31, 7150160), (40, 5541374), (62, 3575080), (80, 2770687), (124, 1787540), (139, 1594640), (155, 1430032), (248, 893770), (278, 797320), (310, 715016), (496, 446885), (556, 398660), (620, 357508), (643, 344720), (695, 318928), (1112, 199330), (1240, 178754), (1286, 172360), (1390, 159464), (2224, 99665), (2480, 89377), (2572, 86180), (2780, 79732), (3215, 68944), (4309, 51440), (5144, 43090), (5560, 39866), (6430, 34472), (8618, 25720), (10288, 21545), (11120, 19933), (12860, 17236)]