19201220

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{83}}^1\times {\mathrm{269}}^1$

素因数の和:404

約数の個数: 48

約数和(自身を含む): 41912640

約数和(自身を除く): 22711420

約数列:

[1, 2, 4, 5, 10, 20, 43, 83, 86, 166, 172, 215, 269, 332, 415, 430, 538, 830, 860, 1076, 1345, 1660, 2690, 3569, 5380, 7138, 11567, 14276, 17845, 22327, 23134, 35690, 44654, 46268, 57835, 71380, 89308, 111635, 115670, 223270, 231340, 446540, 960061, 1920122, 3840244, 4800305, 9600610, 19201220]

約数ペア:

[(1, 19201220), (2, 9600610), (4, 4800305), (5, 3840244), (10, 1920122), (20, 960061), (43, 446540), (83, 231340), (86, 223270), (166, 115670), (172, 111635), (215, 89308), (269, 71380), (332, 57835), (415, 46268), (430, 44654), (538, 35690), (830, 23134), (860, 22327), (1076, 17845), (1345, 14276), (1660, 11567), (2690, 7138), (3569, 5380)]