21316040

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4889}}^1$

素因数の和:5009

約数の個数: 32

約数和(自身を含む): 48411000

約数和(自身を除く): 27094960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4360, 4889, 9778, 19556, 24445, 39112, 48890, 97780, 195560, 532901, 1065802, 2131604, 2664505, 4263208, 5329010, 10658020, 21316040]

約数ペア:

[(1, 21316040), (2, 10658020), (4, 5329010), (5, 4263208), (8, 2664505), (10, 2131604), (20, 1065802), (40, 532901), (109, 195560), (218, 97780), (436, 48890), (545, 39112), (872, 24445), (1090, 19556), (2180, 9778), (4360, 4889)]