81950820

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{195121}}^1$

素因数の和:195140

約数の個数: 48

約数和(自身を含む): 262243968

約数和(自身を除く): 180293148

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 195121, 390242, 585363, 780484, 975605, 1170726, 1365847, 1951210, 2341452, 2731694, 2926815, 3902420, 4097541, 5463388, 5853630, 6829235, 8195082, 11707260, 13658470, 16390164, 20487705, 27316940, 40975410, 81950820]

約数ペア:

[(1, 81950820), (2, 40975410), (3, 27316940), (4, 20487705), (5, 16390164), (6, 13658470), (7, 11707260), (10, 8195082), (12, 6829235), (14, 5853630), (15, 5463388), (20, 4097541), (21, 3902420), (28, 2926815), (30, 2731694), (35, 2341452), (42, 1951210), (60, 1365847), (70, 1170726), (84, 975605), (105, 780484), (140, 585363), (210, 390242), (420, 195121)]