18399700

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{389}}^1$

素因数の和:457

約数の個数: 72

約数和(自身を含む): 44684640

約数和(自身を除く): 26284940

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 43, 44, 50, 55, 86, 100, 110, 172, 215, 220, 275, 389, 430, 473, 550, 778, 860, 946, 1075, 1100, 1556, 1892, 1945, 2150, 2365, 3890, 4279, 4300, 4730, 7780, 8558, 9460, 9725, 11825, 16727, 17116, 19450, 21395, 23650, 33454, 38900, 42790, 47300, 66908, 83635, 85580, 106975, 167270, 183997, 213950, 334540, 367994, 418175, 427900, 735988, 836350, 919985, 1672700, 1839970, 3679940, 4599925, 9199850, 18399700]

約数ペア:

[(1, 18399700), (2, 9199850), (4, 4599925), (5, 3679940), (10, 1839970), (11, 1672700), (20, 919985), (22, 836350), (25, 735988), (43, 427900), (44, 418175), (50, 367994), (55, 334540), (86, 213950), (100, 183997), (110, 167270), (172, 106975), (215, 85580), (220, 83635), (275, 66908), (389, 47300), (430, 42790), (473, 38900), (550, 33454), (778, 23650), (860, 21395), (946, 19450), (1075, 17116), (1100, 16727), (1556, 11825), (1892, 9725), (1945, 9460), (2150, 8558), (2365, 7780), (3890, 4730), (4279, 4300)]