668820

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{157}}^1$

素因数の和:240

約数の個数: 48

約数和(自身を含む): 1911168

約数和(自身を除く): 1242348

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 71, 142, 157, 213, 284, 314, 355, 426, 471, 628, 710, 785, 852, 942, 1065, 1420, 1570, 1884, 2130, 2355, 3140, 4260, 4710, 9420, 11147, 22294, 33441, 44588, 55735, 66882, 111470, 133764, 167205, 222940, 334410, 668820]

約数ペア:

[(1, 668820), (2, 334410), (3, 222940), (4, 167205), (5, 133764), (6, 111470), (10, 66882), (12, 55735), (15, 44588), (20, 33441), (30, 22294), (60, 11147), (71, 9420), (142, 4710), (157, 4260), (213, 3140), (284, 2355), (314, 2130), (355, 1884), (426, 1570), (471, 1420), (628, 1065), (710, 942), (785, 852)]