21099040

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{7757}}^1$

素因数の和:7789

約数の個数: 48

約数和(自身を含む): 52785432

約数和(自身を除く): 31686392

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 68, 80, 85, 136, 160, 170, 272, 340, 544, 680, 1360, 2720, 7757, 15514, 31028, 38785, 62056, 77570, 124112, 131869, 155140, 248224, 263738, 310280, 527476, 620560, 659345, 1054952, 1241120, 1318690, 2109904, 2637380, 4219808, 5274760, 10549520, 21099040]

約数ペア:

[(1, 21099040), (2, 10549520), (4, 5274760), (5, 4219808), (8, 2637380), (10, 2109904), (16, 1318690), (17, 1241120), (20, 1054952), (32, 659345), (34, 620560), (40, 527476), (68, 310280), (80, 263738), (85, 248224), (136, 155140), (160, 131869), (170, 124112), (272, 77570), (340, 62056), (544, 38785), (680, 31028), (1360, 15514), (2720, 7757)]