639261220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{57179}}^1$

素因数の和:57244

約数の個数: 48

約数和(自身を含む): 1479360960

約数和(自身を除く): 840099740

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 43, 52, 65, 86, 130, 172, 215, 260, 430, 559, 860, 1118, 2236, 2795, 5590, 11180, 57179, 114358, 228716, 285895, 571790, 743327, 1143580, 1486654, 2458697, 2973308, 3716635, 4917394, 7433270, 9834788, 12293485, 14866540, 24586970, 31963061, 49173940, 63926122, 127852244, 159815305, 319630610, 639261220]

約数ペア:

[(1, 639261220), (2, 319630610), (4, 159815305), (5, 127852244), (10, 63926122), (13, 49173940), (20, 31963061), (26, 24586970), (43, 14866540), (52, 12293485), (65, 9834788), (86, 7433270), (130, 4917394), (172, 3716635), (215, 2973308), (260, 2458697), (430, 1486654), (559, 1143580), (860, 743327), (1118, 571790), (2236, 285895), (2795, 228716), (5590, 114358), (11180, 57179)]