21190185

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{233}}^1$

素因数の和:334

約数の個数: 48

約数和(自身を含む): 38548224

約数和(自身を除く): 17358039

約数列:

[1, 3, 5, 9, 15, 43, 45, 47, 129, 141, 215, 233, 235, 387, 423, 645, 699, 705, 1165, 1935, 2021, 2097, 2115, 3495, 6063, 10019, 10105, 10485, 10951, 18189, 30057, 30315, 32853, 50095, 54755, 90171, 90945, 98559, 150285, 164265, 450855, 470893, 492795, 1412679, 2354465, 4238037, 7063395, 21190185]

約数ペア:

[(1, 21190185), (3, 7063395), (5, 4238037), (9, 2354465), (15, 1412679), (43, 492795), (45, 470893), (47, 450855), (129, 164265), (141, 150285), (215, 98559), (233, 90945), (235, 90171), (387, 54755), (423, 50095), (645, 32853), (699, 30315), (705, 30057), (1165, 18189), (1935, 10951), (2021, 10485), (2097, 10105), (2115, 10019), (3495, 6063)]