18901980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{173}}^1\times {\mathrm{607}}^1$

素因数の和:795

約数の個数: 72

約数和(自身を含む): 57762432

約数和(自身を除く): 38860452

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 173, 180, 346, 519, 607, 692, 865, 1038, 1214, 1557, 1730, 1821, 2076, 2428, 2595, 3035, 3114, 3460, 3642, 5190, 5463, 6070, 6228, 7284, 7785, 9105, 10380, 10926, 12140, 15570, 18210, 21852, 27315, 31140, 36420, 54630, 105011, 109260, 210022, 315033, 420044, 525055, 630066, 945099, 1050110, 1260132, 1575165, 1890198, 2100220, 3150330, 3780396, 4725495, 6300660, 9450990, 18901980]

約数ペア:

[(1, 18901980), (2, 9450990), (3, 6300660), (4, 4725495), (5, 3780396), (6, 3150330), (9, 2100220), (10, 1890198), (12, 1575165), (15, 1260132), (18, 1050110), (20, 945099), (30, 630066), (36, 525055), (45, 420044), (60, 315033), (90, 210022), (173, 109260), (180, 105011), (346, 54630), (519, 36420), (607, 31140), (692, 27315), (865, 21852), (1038, 18210), (1214, 15570), (1557, 12140), (1730, 10926), (1821, 10380), (2076, 9105), (2428, 7785), (2595, 7284), (3035, 6228), (3114, 6070), (3460, 5463), (3642, 5190)]