72105040

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{331}}^1\times {\mathrm{389}}^1$

素因数の和:740

約数の個数: 80

約数和(自身を含む): 192666240

約数和(自身を除く): 120561200

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 331, 389, 560, 662, 778, 1324, 1556, 1655, 1945, 2317, 2648, 2723, 3112, 3310, 3890, 4634, 5296, 5446, 6224, 6620, 7780, 9268, 10892, 11585, 13240, 13615, 15560, 18536, 21784, 23170, 26480, 27230, 31120, 37072, 43568, 46340, 54460, 92680, 108920, 128759, 185360, 217840, 257518, 515036, 643795, 901313, 1030072, 1287590, 1802626, 2060144, 2575180, 3605252, 4506565, 5150360, 7210504, 9013130, 10300720, 14421008, 18026260, 36052520, 72105040]

約数ペア:

[(1, 72105040), (2, 36052520), (4, 18026260), (5, 14421008), (7, 10300720), (8, 9013130), (10, 7210504), (14, 5150360), (16, 4506565), (20, 3605252), (28, 2575180), (35, 2060144), (40, 1802626), (56, 1287590), (70, 1030072), (80, 901313), (112, 643795), (140, 515036), (280, 257518), (331, 217840), (389, 185360), (560, 128759), (662, 108920), (778, 92680), (1324, 54460), (1556, 46340), (1655, 43568), (1945, 37072), (2317, 31120), (2648, 27230), (2723, 26480), (3112, 23170), (3310, 21784), (3890, 18536), (4634, 15560), (5296, 13615), (5446, 13240), (6224, 11585), (6620, 10892), (7780, 9268)]