21151890

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{197}}^1\times {\mathrm{1193}}^1$

素因数の和:1403

約数の個数: 48

約数和(自身を含む): 55320408

約数和(自身を除く): 34168518

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 197, 394, 591, 985, 1182, 1193, 1773, 1970, 2386, 2955, 3546, 3579, 5910, 5965, 7158, 8865, 10737, 11930, 17730, 17895, 21474, 35790, 53685, 107370, 235021, 470042, 705063, 1175105, 1410126, 2115189, 2350210, 3525315, 4230378, 7050630, 10575945, 21151890]

約数ペア:

[(1, 21151890), (2, 10575945), (3, 7050630), (5, 4230378), (6, 3525315), (9, 2350210), (10, 2115189), (15, 1410126), (18, 1175105), (30, 705063), (45, 470042), (90, 235021), (197, 107370), (394, 53685), (591, 35790), (985, 21474), (1182, 17895), (1193, 17730), (1773, 11930), (1970, 10737), (2386, 8865), (2955, 7158), (3546, 5965), (3579, 5910)]