81881730

素因数分解:

$2^1\times 3^2\times 5^1\times 7^1\times {\mathrm{129971}}^1$

素因数の和:129991

約数の個数: 48

約数和(自身を含む): 243307584

約数和(自身を除く): 161425854

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 21, 30, 35, 42, 45, 63, 70, 90, 105, 126, 210, 315, 630, 129971, 259942, 389913, 649855, 779826, 909797, 1169739, 1299710, 1819594, 1949565, 2339478, 2729391, 3899130, 4548985, 5458782, 5848695, 8188173, 9097970, 11697390, 13646955, 16376346, 27293910, 40940865, 81881730]

約数ペア:

[(1, 81881730), (2, 40940865), (3, 27293910), (5, 16376346), (6, 13646955), (7, 11697390), (9, 9097970), (10, 8188173), (14, 5848695), (15, 5458782), (18, 4548985), (21, 3899130), (30, 2729391), (35, 2339478), (42, 1949565), (45, 1819594), (63, 1299710), (70, 1169739), (90, 909797), (105, 779826), (126, 649855), (210, 389913), (315, 259942), (630, 129971)]