81396540

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{19661}}^1$

素因数の和:19699

約数の個数: 72

約数和(自身を含む): 257650848

約数和(自身を除く): 176254308

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 23, 30, 36, 45, 46, 60, 69, 90, 92, 115, 138, 180, 207, 230, 276, 345, 414, 460, 690, 828, 1035, 1380, 2070, 4140, 19661, 39322, 58983, 78644, 98305, 117966, 176949, 196610, 235932, 294915, 353898, 393220, 452203, 589830, 707796, 884745, 904406, 1179660, 1356609, 1769490, 1808812, 2261015, 2713218, 3538980, 4069827, 4522030, 5426436, 6783045, 8139654, 9044060, 13566090, 16279308, 20349135, 27132180, 40698270, 81396540]

約数ペア:

[(1, 81396540), (2, 40698270), (3, 27132180), (4, 20349135), (5, 16279308), (6, 13566090), (9, 9044060), (10, 8139654), (12, 6783045), (15, 5426436), (18, 4522030), (20, 4069827), (23, 3538980), (30, 2713218), (36, 2261015), (45, 1808812), (46, 1769490), (60, 1356609), (69, 1179660), (90, 904406), (92, 884745), (115, 707796), (138, 589830), (180, 452203), (207, 393220), (230, 353898), (276, 294915), (345, 235932), (414, 196610), (460, 176949), (690, 117966), (828, 98305), (1035, 78644), (1380, 58983), (2070, 39322), (4140, 19661)]