20640560

素因数分解:

$2^4\times 5^1\times {\mathrm{59}}^1\times {\mathrm{4373}}^1$

素因数の和:4445

約数の個数: 40

約数和(自身を含む): 48813840

約数和(自身を除く): 28173280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 59, 80, 118, 236, 295, 472, 590, 944, 1180, 2360, 4373, 4720, 8746, 17492, 21865, 34984, 43730, 69968, 87460, 174920, 258007, 349840, 516014, 1032028, 1290035, 2064056, 2580070, 4128112, 5160140, 10320280, 20640560]

約数ペア:

[(1, 20640560), (2, 10320280), (4, 5160140), (5, 4128112), (8, 2580070), (10, 2064056), (16, 1290035), (20, 1032028), (40, 516014), (59, 349840), (80, 258007), (118, 174920), (236, 87460), (295, 69968), (472, 43730), (590, 34984), (944, 21865), (1180, 17492), (2360, 8746), (4373, 4720)]