657539980

素因数分解:

$2^2\times 5^1\times {\mathrm{149}}^1\times {\mathrm{233}}^1\times {\mathrm{947}}^1$

素因数の和:1338

約数の個数: 48

約数和(自身を含む): 1397541600

約数和(自身を除く): 740001620

約数列:

[1, 2, 4, 5, 10, 20, 149, 233, 298, 466, 596, 745, 932, 947, 1165, 1490, 1894, 2330, 2980, 3788, 4660, 4735, 9470, 18940, 34717, 69434, 138868, 141103, 173585, 220651, 282206, 347170, 441302, 564412, 694340, 705515, 882604, 1103255, 1411030, 2206510, 2822060, 4413020, 32876999, 65753998, 131507996, 164384995, 328769990, 657539980]

約数ペア:

[(1, 657539980), (2, 328769990), (4, 164384995), (5, 131507996), (10, 65753998), (20, 32876999), (149, 4413020), (233, 2822060), (298, 2206510), (466, 1411030), (596, 1103255), (745, 882604), (932, 705515), (947, 694340), (1165, 564412), (1490, 441302), (1894, 347170), (2330, 282206), (2980, 220651), (3788, 173585), (4660, 141103), (4735, 138868), (9470, 69434), (18940, 34717)]