1320328040

素因数分解:

$2^3\times 5^1\times {\mathrm{131}}^1\times {\mathrm{251971}}^1$

素因数の和:252113

約数の個数: 32

約数和(自身を含む): 2993427360

約数和(自身を除く): 1673099320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 131, 262, 524, 655, 1048, 1310, 2620, 5240, 251971, 503942, 1007884, 1259855, 2015768, 2519710, 5039420, 10078840, 33008201, 66016402, 132032804, 165041005, 264065608, 330082010, 660164020, 1320328040]

約数ペア:

[(1, 1320328040), (2, 660164020), (4, 330082010), (5, 264065608), (8, 165041005), (10, 132032804), (20, 66016402), (40, 33008201), (131, 10078840), (262, 5039420), (524, 2519710), (655, 2015768), (1048, 1259855), (1310, 1007884), (2620, 503942), (5240, 251971)]