80208020

素因数分解:

$2^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{137}}^1\times {\mathrm{401}}^1$

素因数の和:620

約数の個数: 48

約数和(自身を含む): 172419408

約数和(自身を除く): 92211388

約数列:

[1, 2, 4, 5, 10, 20, 73, 137, 146, 274, 292, 365, 401, 548, 685, 730, 802, 1370, 1460, 1604, 2005, 2740, 4010, 8020, 10001, 20002, 29273, 40004, 50005, 54937, 58546, 100010, 109874, 117092, 146365, 200020, 219748, 274685, 292730, 549370, 585460, 1098740, 4010401, 8020802, 16041604, 20052005, 40104010, 80208020]

約数ペア:

[(1, 80208020), (2, 40104010), (4, 20052005), (5, 16041604), (10, 8020802), (20, 4010401), (73, 1098740), (137, 585460), (146, 549370), (274, 292730), (292, 274685), (365, 219748), (401, 200020), (548, 146365), (685, 117092), (730, 109874), (802, 100010), (1370, 58546), (1460, 54937), (1604, 50005), (2005, 40004), (2740, 29273), (4010, 20002), (8020, 10001)]