81978960

素因数分解:

$2^4\times 3^1\times 5^1\times 7^2\times {\mathrm{6971}}^1$

素因数の和:7001

約数の個数: 120

約数和(自身を含む): 295668576

約数和(自身を除く): 213689616

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 49, 56, 60, 70, 80, 84, 98, 105, 112, 120, 140, 147, 168, 196, 210, 240, 245, 280, 294, 336, 392, 420, 490, 560, 588, 735, 784, 840, 980, 1176, 1470, 1680, 1960, 2352, 2940, 3920, 5880, 6971, 11760, 13942, 20913, 27884, 34855, 41826, 48797, 55768, 69710, 83652, 97594, 104565, 111536, 139420, 146391, 167304, 195188, 209130, 243985, 278840, 292782, 334608, 341579, 390376, 418260, 487970, 557680, 585564, 683158, 731955, 780752, 836520, 975940, 1024737, 1171128, 1366316, 1463910, 1673040, 1707895, 1951880, 2049474, 2342256, 2732632, 2927820, 3415790, 3903760, 4098948, 5123685, 5465264, 5855640, 6831580, 8197896, 10247370, 11711280, 13663160, 16395792, 20494740, 27326320, 40989480, 81978960]

約数ペア:

[(1, 81978960), (2, 40989480), (3, 27326320), (4, 20494740), (5, 16395792), (6, 13663160), (7, 11711280), (8, 10247370), (10, 8197896), (12, 6831580), (14, 5855640), (15, 5465264), (16, 5123685), (20, 4098948), (21, 3903760), (24, 3415790), (28, 2927820), (30, 2732632), (35, 2342256), (40, 2049474), (42, 1951880), (48, 1707895), (49, 1673040), (56, 1463910), (60, 1366316), (70, 1171128), (80, 1024737), (84, 975940), (98, 836520), (105, 780752), (112, 731955), (120, 683158), (140, 585564), (147, 557680), (168, 487970), (196, 418260), (210, 390376), (240, 341579), (245, 334608), (280, 292782), (294, 278840), (336, 243985), (392, 209130), (420, 195188), (490, 167304), (560, 146391), (588, 139420), (735, 111536), (784, 104565), (840, 97594), (980, 83652), (1176, 69710), (1470, 55768), (1680, 48797), (1960, 41826), (2352, 34855), (2940, 27884), (3920, 20913), (5880, 13942), (6971, 11760)]