21755960

素因数分解:

$2^3\times 5^1\times {\mathrm{83}}^1\times {\mathrm{6553}}^1$

素因数の和:6647

約数の個数: 32

約数和(自身を含む): 49548240

約数和(自身を除く): 27792280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 83, 166, 332, 415, 664, 830, 1660, 3320, 6553, 13106, 26212, 32765, 52424, 65530, 131060, 262120, 543899, 1087798, 2175596, 2719495, 4351192, 5438990, 10877980, 21755960]

約数ペア:

[(1, 21755960), (2, 10877980), (4, 5438990), (5, 4351192), (8, 2719495), (10, 2175596), (20, 1087798), (40, 543899), (83, 262120), (166, 131060), (332, 65530), (415, 52424), (664, 32765), (830, 26212), (1660, 13106), (3320, 6553)]