21040010

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{1013}}^1$

素因数の和:1118

約数の個数: 32

約数和(自身を含む): 39716352

約数和(自身を除く): 18676342

約数列:

[1, 2, 5, 10, 31, 62, 67, 134, 155, 310, 335, 670, 1013, 2026, 2077, 4154, 5065, 10130, 10385, 20770, 31403, 62806, 67871, 135742, 157015, 314030, 339355, 678710, 2104001, 4208002, 10520005, 21040010]

約数ペア:

[(1, 21040010), (2, 10520005), (5, 4208002), (10, 2104001), (31, 678710), (62, 339355), (67, 314030), (134, 157015), (155, 135742), (310, 67871), (335, 62806), (670, 31403), (1013, 20770), (2026, 10385), (2077, 10130), (4154, 5065)]