80628920

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{157}}^1\times {\mathrm{347}}^1$

素因数の和:552

約数の個数: 64

約数和(自身を含む): 188045280

約数和(自身を除く): 107416360

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 148, 157, 185, 296, 314, 347, 370, 628, 694, 740, 785, 1256, 1388, 1480, 1570, 1735, 2776, 3140, 3470, 5809, 6280, 6940, 11618, 12839, 13880, 23236, 25678, 29045, 46472, 51356, 54479, 58090, 64195, 102712, 108958, 116180, 128390, 217916, 232360, 256780, 272395, 435832, 513560, 544790, 1089580, 2015723, 2179160, 4031446, 8062892, 10078615, 16125784, 20157230, 40314460, 80628920]

約数ペア:

[(1, 80628920), (2, 40314460), (4, 20157230), (5, 16125784), (8, 10078615), (10, 8062892), (20, 4031446), (37, 2179160), (40, 2015723), (74, 1089580), (148, 544790), (157, 513560), (185, 435832), (296, 272395), (314, 256780), (347, 232360), (370, 217916), (628, 128390), (694, 116180), (740, 108958), (785, 102712), (1256, 64195), (1388, 58090), (1480, 54479), (1570, 51356), (1735, 46472), (2776, 29045), (3140, 25678), (3470, 23236), (5809, 13880), (6280, 12839), (6940, 11618)]