28375880

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{277}}^1$

素因数の和:498

約数の個数: 64

約数和(自身を含む): 69355440

約数和(自身を除く): 40979560

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 197, 260, 277, 394, 520, 554, 788, 985, 1108, 1385, 1576, 1970, 2216, 2561, 2770, 3601, 3940, 5122, 5540, 7202, 7880, 10244, 11080, 12805, 14404, 18005, 20488, 25610, 28808, 36010, 51220, 54569, 72020, 102440, 109138, 144040, 218276, 272845, 436552, 545690, 709397, 1091380, 1418794, 2182760, 2837588, 3546985, 5675176, 7093970, 14187940, 28375880]

約数ペア:

[(1, 28375880), (2, 14187940), (4, 7093970), (5, 5675176), (8, 3546985), (10, 2837588), (13, 2182760), (20, 1418794), (26, 1091380), (40, 709397), (52, 545690), (65, 436552), (104, 272845), (130, 218276), (197, 144040), (260, 109138), (277, 102440), (394, 72020), (520, 54569), (554, 51220), (788, 36010), (985, 28808), (1108, 25610), (1385, 20488), (1576, 18005), (1970, 14404), (2216, 12805), (2561, 11080), (2770, 10244), (3601, 7880), (3940, 7202), (5122, 5540)]