21489910

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{3119}}^1$

素因数の和:3192

約数の個数: 32

約数和(自身を含む): 42456960

約数和(自身を除く): 20967050

約数列:

[1, 2, 5, 10, 13, 26, 53, 65, 106, 130, 265, 530, 689, 1378, 3119, 3445, 6238, 6890, 15595, 31190, 40547, 81094, 165307, 202735, 330614, 405470, 826535, 1653070, 2148991, 4297982, 10744955, 21489910]

約数ペア:

[(1, 21489910), (2, 10744955), (5, 4297982), (10, 2148991), (13, 1653070), (26, 826535), (53, 405470), (65, 330614), (106, 202735), (130, 165307), (265, 81094), (530, 40547), (689, 31190), (1378, 15595), (3119, 6890), (3445, 6238)]