81236120

素因数分解:

$2^3\times 5^1\times 7^3\times {\mathrm{31}}^1\times {\mathrm{191}}^1$

素因数の和:254

約数の個数: 128

約数和(自身を含む): 221184000

約数和(自身を除く): 139947880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 31, 35, 40, 49, 56, 62, 70, 98, 124, 140, 155, 191, 196, 217, 245, 248, 280, 310, 343, 382, 392, 434, 490, 620, 686, 764, 868, 955, 980, 1085, 1240, 1337, 1372, 1519, 1528, 1715, 1736, 1910, 1960, 2170, 2674, 2744, 3038, 3430, 3820, 4340, 5348, 5921, 6076, 6685, 6860, 7595, 7640, 8680, 9359, 10633, 10696, 11842, 12152, 13370, 13720, 15190, 18718, 21266, 23684, 26740, 29605, 30380, 37436, 41447, 42532, 46795, 47368, 53165, 53480, 59210, 60760, 65513, 74872, 82894, 85064, 93590, 106330, 118420, 131026, 165788, 187180, 207235, 212660, 236840, 262052, 290129, 327565, 331576, 374360, 414470, 425320, 524104, 580258, 655130, 828940, 1160516, 1310260, 1450645, 1657880, 2030903, 2321032, 2620520, 2901290, 4061806, 5802580, 8123612, 10154515, 11605160, 16247224, 20309030, 40618060, 81236120]

約数ペア:

[(1, 81236120), (2, 40618060), (4, 20309030), (5, 16247224), (7, 11605160), (8, 10154515), (10, 8123612), (14, 5802580), (20, 4061806), (28, 2901290), (31, 2620520), (35, 2321032), (40, 2030903), (49, 1657880), (56, 1450645), (62, 1310260), (70, 1160516), (98, 828940), (124, 655130), (140, 580258), (155, 524104), (191, 425320), (196, 414470), (217, 374360), (245, 331576), (248, 327565), (280, 290129), (310, 262052), (343, 236840), (382, 212660), (392, 207235), (434, 187180), (490, 165788), (620, 131026), (686, 118420), (764, 106330), (868, 93590), (955, 85064), (980, 82894), (1085, 74872), (1240, 65513), (1337, 60760), (1372, 59210), (1519, 53480), (1528, 53165), (1715, 47368), (1736, 46795), (1910, 42532), (1960, 41447), (2170, 37436), (2674, 30380), (2744, 29605), (3038, 26740), (3430, 23684), (3820, 21266), (4340, 18718), (5348, 15190), (5921, 13720), (6076, 13370), (6685, 12152), (6860, 11842), (7595, 10696), (7640, 10633), (8680, 9359)]