81361980

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{2083}}^1$

素因数の和:2136

約数の個数: 144

約数和(自身を含む): 291293184

約数和(自身を除く): 209931204

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 31, 35, 36, 42, 45, 60, 62, 63, 70, 84, 90, 93, 105, 124, 126, 140, 155, 180, 186, 210, 217, 252, 279, 310, 315, 372, 420, 434, 465, 558, 620, 630, 651, 868, 930, 1085, 1116, 1260, 1302, 1395, 1860, 1953, 2083, 2170, 2604, 2790, 3255, 3906, 4166, 4340, 5580, 6249, 6510, 7812, 8332, 9765, 10415, 12498, 13020, 14581, 18747, 19530, 20830, 24996, 29162, 31245, 37494, 39060, 41660, 43743, 58324, 62490, 64573, 72905, 74988, 87486, 93735, 124980, 129146, 131229, 145810, 174972, 187470, 193719, 218715, 258292, 262458, 291620, 322865, 374940, 387438, 437430, 452011, 524916, 581157, 645730, 656145, 774876, 874860, 904022, 968595, 1162314, 1291460, 1312290, 1356033, 1808044, 1937190, 2260055, 2324628, 2624580, 2712066, 2905785, 3874380, 4068099, 4520110, 5424132, 5811570, 6780165, 8136198, 9040220, 11623140, 13560330, 16272396, 20340495, 27120660, 40680990, 81361980]

約数ペア:

[(1, 81361980), (2, 40680990), (3, 27120660), (4, 20340495), (5, 16272396), (6, 13560330), (7, 11623140), (9, 9040220), (10, 8136198), (12, 6780165), (14, 5811570), (15, 5424132), (18, 4520110), (20, 4068099), (21, 3874380), (28, 2905785), (30, 2712066), (31, 2624580), (35, 2324628), (36, 2260055), (42, 1937190), (45, 1808044), (60, 1356033), (62, 1312290), (63, 1291460), (70, 1162314), (84, 968595), (90, 904022), (93, 874860), (105, 774876), (124, 656145), (126, 645730), (140, 581157), (155, 524916), (180, 452011), (186, 437430), (210, 387438), (217, 374940), (252, 322865), (279, 291620), (310, 262458), (315, 258292), (372, 218715), (420, 193719), (434, 187470), (465, 174972), (558, 145810), (620, 131229), (630, 129146), (651, 124980), (868, 93735), (930, 87486), (1085, 74988), (1116, 72905), (1260, 64573), (1302, 62490), (1395, 58324), (1860, 43743), (1953, 41660), (2083, 39060), (2170, 37494), (2604, 31245), (2790, 29162), (3255, 24996), (3906, 20830), (4166, 19530), (4340, 18747), (5580, 14581), (6249, 13020), (6510, 12498), (7812, 10415), (8332, 9765)]