21120008

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{433}}^1$

素因数の和:526

約数の個数: 64

約数和(自身を含む): 49580160

約数和(自身を除く): 28460152

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 67, 91, 104, 134, 182, 268, 364, 433, 469, 536, 728, 866, 871, 938, 1732, 1742, 1876, 3031, 3464, 3484, 3752, 5629, 6062, 6097, 6968, 11258, 12124, 12194, 22516, 24248, 24388, 29011, 39403, 45032, 48776, 58022, 78806, 116044, 157612, 203077, 232088, 315224, 377143, 406154, 754286, 812308, 1508572, 1624616, 2640001, 3017144, 5280002, 10560004, 21120008]

約数ペア:

[(1, 21120008), (2, 10560004), (4, 5280002), (7, 3017144), (8, 2640001), (13, 1624616), (14, 1508572), (26, 812308), (28, 754286), (52, 406154), (56, 377143), (67, 315224), (91, 232088), (104, 203077), (134, 157612), (182, 116044), (268, 78806), (364, 58022), (433, 48776), (469, 45032), (536, 39403), (728, 29011), (866, 24388), (871, 24248), (938, 22516), (1732, 12194), (1742, 12124), (1876, 11258), (3031, 6968), (3464, 6097), (3484, 6062), (3752, 5629)]