21761272

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{2521}}^1$

素因数の和:2623

約数の個数: 32

約数和(自身を含む): 44488080

約数和(自身を除く): 22726808

約数列:

[1, 2, 4, 8, 13, 26, 52, 83, 104, 166, 332, 664, 1079, 2158, 2521, 4316, 5042, 8632, 10084, 20168, 32773, 65546, 131092, 209243, 262184, 418486, 836972, 1673944, 2720159, 5440318, 10880636, 21761272]

約数ペア:

[(1, 21761272), (2, 10880636), (4, 5440318), (8, 2720159), (13, 1673944), (26, 836972), (52, 418486), (83, 262184), (104, 209243), (166, 131092), (332, 65546), (664, 32773), (1079, 20168), (2158, 10084), (2521, 8632), (4316, 5042)]