81677680

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{929}}^1$

素因数の和:1106

約数の個数: 80

約数和(自身を含む): 218646720

約数和(自身を除く): 136969040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 157, 280, 314, 560, 628, 785, 929, 1099, 1256, 1570, 1858, 2198, 2512, 3140, 3716, 4396, 4645, 5495, 6280, 6503, 7432, 8792, 9290, 10990, 12560, 13006, 14864, 17584, 18580, 21980, 26012, 32515, 37160, 43960, 52024, 65030, 74320, 87920, 104048, 130060, 145853, 260120, 291706, 520240, 583412, 729265, 1020971, 1166824, 1458530, 2041942, 2333648, 2917060, 4083884, 5104855, 5834120, 8167768, 10209710, 11668240, 16335536, 20419420, 40838840, 81677680]

約数ペア:

[(1, 81677680), (2, 40838840), (4, 20419420), (5, 16335536), (7, 11668240), (8, 10209710), (10, 8167768), (14, 5834120), (16, 5104855), (20, 4083884), (28, 2917060), (35, 2333648), (40, 2041942), (56, 1458530), (70, 1166824), (80, 1020971), (112, 729265), (140, 583412), (157, 520240), (280, 291706), (314, 260120), (560, 145853), (628, 130060), (785, 104048), (929, 87920), (1099, 74320), (1256, 65030), (1570, 52024), (1858, 43960), (2198, 37160), (2512, 32515), (3140, 26012), (3716, 21980), (4396, 18580), (4645, 17584), (5495, 14864), (6280, 13006), (6503, 12560), (7432, 10990), (8792, 9290)]