2640080

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{541}}^1$

素因数の和:615

約数の個数: 40

約数和(自身を含む): 6250344

約数和(自身を除く): 3610264

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 80, 122, 244, 305, 488, 541, 610, 976, 1082, 1220, 2164, 2440, 2705, 4328, 4880, 5410, 8656, 10820, 21640, 33001, 43280, 66002, 132004, 165005, 264008, 330010, 528016, 660020, 1320040, 2640080]

約数ペア:

[(1, 2640080), (2, 1320040), (4, 660020), (5, 528016), (8, 330010), (10, 264008), (16, 165005), (20, 132004), (40, 66002), (61, 43280), (80, 33001), (122, 21640), (244, 10820), (305, 8656), (488, 5410), (541, 4880), (610, 4328), (976, 2705), (1082, 2440), (1220, 2164)]