80787280

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{557}}^1$

素因数の和:621

約数の個数: 120

約数和(自身を含む): 224804808

約数和(自身を除く): 144017528

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 37, 40, 49, 56, 70, 74, 80, 98, 112, 140, 148, 185, 196, 245, 259, 280, 296, 370, 392, 490, 518, 557, 560, 592, 740, 784, 980, 1036, 1114, 1295, 1480, 1813, 1960, 2072, 2228, 2590, 2785, 2960, 3626, 3899, 3920, 4144, 4456, 5180, 5570, 7252, 7798, 8912, 9065, 10360, 11140, 14504, 15596, 18130, 19495, 20609, 20720, 22280, 27293, 29008, 31192, 36260, 38990, 41218, 44560, 54586, 62384, 72520, 77980, 82436, 103045, 109172, 136465, 144263, 145040, 155960, 164872, 206090, 218344, 272930, 288526, 311920, 329744, 412180, 436688, 545860, 577052, 721315, 824360, 1009841, 1091720, 1154104, 1442630, 1648720, 2019682, 2183440, 2308208, 2885260, 4039364, 5049205, 5770520, 8078728, 10098410, 11541040, 16157456, 20196820, 40393640, 80787280]

約数ペア:

[(1, 80787280), (2, 40393640), (4, 20196820), (5, 16157456), (7, 11541040), (8, 10098410), (10, 8078728), (14, 5770520), (16, 5049205), (20, 4039364), (28, 2885260), (35, 2308208), (37, 2183440), (40, 2019682), (49, 1648720), (56, 1442630), (70, 1154104), (74, 1091720), (80, 1009841), (98, 824360), (112, 721315), (140, 577052), (148, 545860), (185, 436688), (196, 412180), (245, 329744), (259, 311920), (280, 288526), (296, 272930), (370, 218344), (392, 206090), (490, 164872), (518, 155960), (557, 145040), (560, 144263), (592, 136465), (740, 109172), (784, 103045), (980, 82436), (1036, 77980), (1114, 72520), (1295, 62384), (1480, 54586), (1813, 44560), (1960, 41218), (2072, 38990), (2228, 36260), (2590, 31192), (2785, 29008), (2960, 27293), (3626, 22280), (3899, 20720), (3920, 20609), (4144, 19495), (4456, 18130), (5180, 15596), (5570, 14504), (7252, 11140), (7798, 10360), (8912, 9065)]