81136160

素因数分解:

$2^5\times 5^1\times 7^2\times {\mathrm{79}}^1\times {\mathrm{131}}^1$

素因数の和:239

約数の個数: 144

約数和(自身を含む): 227525760

約数和(自身を除く): 146389600

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 70, 79, 80, 98, 112, 131, 140, 158, 160, 196, 224, 245, 262, 280, 316, 392, 395, 490, 524, 553, 560, 632, 655, 784, 790, 917, 980, 1048, 1106, 1120, 1264, 1310, 1568, 1580, 1834, 1960, 2096, 2212, 2528, 2620, 2765, 3160, 3668, 3871, 3920, 4192, 4424, 4585, 5240, 5530, 6320, 6419, 7336, 7742, 7840, 8848, 9170, 10349, 10480, 11060, 12640, 12838, 14672, 15484, 17696, 18340, 19355, 20698, 20960, 22120, 25676, 29344, 30968, 32095, 36680, 38710, 41396, 44240, 51352, 51745, 61936, 64190, 72443, 73360, 77420, 82792, 88480, 102704, 103490, 123872, 128380, 144886, 146720, 154840, 165584, 205408, 206980, 256760, 289772, 309680, 331168, 362215, 413960, 507101, 513520, 579544, 619360, 724430, 827920, 1014202, 1027040, 1159088, 1448860, 1655840, 2028404, 2318176, 2535505, 2897720, 4056808, 5071010, 5795440, 8113616, 10142020, 11590880, 16227232, 20284040, 40568080, 81136160]

約数ペア:

[(1, 81136160), (2, 40568080), (4, 20284040), (5, 16227232), (7, 11590880), (8, 10142020), (10, 8113616), (14, 5795440), (16, 5071010), (20, 4056808), (28, 2897720), (32, 2535505), (35, 2318176), (40, 2028404), (49, 1655840), (56, 1448860), (70, 1159088), (79, 1027040), (80, 1014202), (98, 827920), (112, 724430), (131, 619360), (140, 579544), (158, 513520), (160, 507101), (196, 413960), (224, 362215), (245, 331168), (262, 309680), (280, 289772), (316, 256760), (392, 206980), (395, 205408), (490, 165584), (524, 154840), (553, 146720), (560, 144886), (632, 128380), (655, 123872), (784, 103490), (790, 102704), (917, 88480), (980, 82792), (1048, 77420), (1106, 73360), (1120, 72443), (1264, 64190), (1310, 61936), (1568, 51745), (1580, 51352), (1834, 44240), (1960, 41396), (2096, 38710), (2212, 36680), (2528, 32095), (2620, 30968), (2765, 29344), (3160, 25676), (3668, 22120), (3871, 20960), (3920, 20698), (4192, 19355), (4424, 18340), (4585, 17696), (5240, 15484), (5530, 14672), (6320, 12838), (6419, 12640), (7336, 11060), (7742, 10480), (7840, 10349), (8848, 9170)]