209714980

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{331}}^1\times {\mathrm{401}}^1$

素因数の和:820

約数の個数: 48

約数和(自身を含む): 448439040

約数和(自身を除く): 238724060

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 331, 395, 401, 662, 790, 802, 1324, 1580, 1604, 1655, 2005, 3310, 4010, 6620, 8020, 26149, 31679, 52298, 63358, 104596, 126716, 130745, 132731, 158395, 261490, 265462, 316790, 522980, 530924, 633580, 663655, 1327310, 2654620, 10485749, 20971498, 41942996, 52428745, 104857490, 209714980]

約数ペア:

[(1, 209714980), (2, 104857490), (4, 52428745), (5, 41942996), (10, 20971498), (20, 10485749), (79, 2654620), (158, 1327310), (316, 663655), (331, 633580), (395, 530924), (401, 522980), (662, 316790), (790, 265462), (802, 261490), (1324, 158395), (1580, 132731), (1604, 130745), (1655, 126716), (2005, 104596), (3310, 63358), (4010, 52298), (6620, 31679), (8020, 26149)]