21214880

素因数分解:

$2^5\times 5^1\times {\mathrm{67}}^1\times {\mathrm{1979}}^1$

素因数の和:2061

約数の個数: 48

約数和(自身を含む): 50893920

約数和(自身を除く): 29679040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 67, 80, 134, 160, 268, 335, 536, 670, 1072, 1340, 1979, 2144, 2680, 3958, 5360, 7916, 9895, 10720, 15832, 19790, 31664, 39580, 63328, 79160, 132593, 158320, 265186, 316640, 530372, 662965, 1060744, 1325930, 2121488, 2651860, 4242976, 5303720, 10607440, 21214880]

約数ペア:

[(1, 21214880), (2, 10607440), (4, 5303720), (5, 4242976), (8, 2651860), (10, 2121488), (16, 1325930), (20, 1060744), (32, 662965), (40, 530372), (67, 316640), (80, 265186), (134, 158320), (160, 132593), (268, 79160), (335, 63328), (536, 39580), (670, 31664), (1072, 19790), (1340, 15832), (1979, 10720), (2144, 9895), (2680, 7916), (3958, 5360)]