21831700

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{223}}^1$

素因数の和:337

約数の個数: 72

約数和(自身を含む): 52496640

約数和(自身を除く): 30664940

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 89, 100, 110, 178, 220, 223, 275, 356, 445, 446, 550, 890, 892, 979, 1100, 1115, 1780, 1958, 2225, 2230, 2453, 3916, 4450, 4460, 4895, 4906, 5575, 8900, 9790, 9812, 11150, 12265, 19580, 19847, 22300, 24475, 24530, 39694, 48950, 49060, 61325, 79388, 97900, 99235, 122650, 198470, 218317, 245300, 396940, 436634, 496175, 873268, 992350, 1091585, 1984700, 2183170, 4366340, 5457925, 10915850, 21831700]

約数ペア:

[(1, 21831700), (2, 10915850), (4, 5457925), (5, 4366340), (10, 2183170), (11, 1984700), (20, 1091585), (22, 992350), (25, 873268), (44, 496175), (50, 436634), (55, 396940), (89, 245300), (100, 218317), (110, 198470), (178, 122650), (220, 99235), (223, 97900), (275, 79388), (356, 61325), (445, 49060), (446, 48950), (550, 39694), (890, 24530), (892, 24475), (979, 22300), (1100, 19847), (1115, 19580), (1780, 12265), (1958, 11150), (2225, 9812), (2230, 9790), (2453, 8900), (3916, 5575), (4450, 4906), (4460, 4895)]