21194240

素因数分解:

$2^9\times 5^1\times {\mathrm{17}}^1\times {\mathrm{487}}^1$

素因数の和:527

約数の個数: 80

約数和(自身を含む): 53916192

約数和(自身を除く): 32721952

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 128, 136, 160, 170, 256, 272, 320, 340, 487, 512, 544, 640, 680, 974, 1088, 1280, 1360, 1948, 2176, 2435, 2560, 2720, 3896, 4352, 4870, 5440, 7792, 8279, 8704, 9740, 10880, 15584, 16558, 19480, 21760, 31168, 33116, 38960, 41395, 43520, 62336, 66232, 77920, 82790, 124672, 132464, 155840, 165580, 249344, 264928, 311680, 331160, 529856, 623360, 662320, 1059712, 1246720, 1324640, 2119424, 2649280, 4238848, 5298560, 10597120, 21194240]

約数ペア:

[(1, 21194240), (2, 10597120), (4, 5298560), (5, 4238848), (8, 2649280), (10, 2119424), (16, 1324640), (17, 1246720), (20, 1059712), (32, 662320), (34, 623360), (40, 529856), (64, 331160), (68, 311680), (80, 264928), (85, 249344), (128, 165580), (136, 155840), (160, 132464), (170, 124672), (256, 82790), (272, 77920), (320, 66232), (340, 62336), (487, 43520), (512, 41395), (544, 38960), (640, 33116), (680, 31168), (974, 21760), (1088, 19480), (1280, 16558), (1360, 15584), (1948, 10880), (2176, 9740), (2435, 8704), (2560, 8279), (2720, 7792), (3896, 5440), (4352, 4870)]