19801440

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{13751}}^1$

素因数の和:13772

約数の個数: 72

約数和(自身を含む): 67577328

約数和(自身を除く): 47775888

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 45, 48, 60, 72, 80, 90, 96, 120, 144, 160, 180, 240, 288, 360, 480, 720, 1440, 13751, 27502, 41253, 55004, 68755, 82506, 110008, 123759, 137510, 165012, 206265, 220016, 247518, 275020, 330024, 412530, 440032, 495036, 550040, 618795, 660048, 825060, 990072, 1100080, 1237590, 1320096, 1650120, 1980144, 2200160, 2475180, 3300240, 3960288, 4950360, 6600480, 9900720, 19801440]

約数ペア:

[(1, 19801440), (2, 9900720), (3, 6600480), (4, 4950360), (5, 3960288), (6, 3300240), (8, 2475180), (9, 2200160), (10, 1980144), (12, 1650120), (15, 1320096), (16, 1237590), (18, 1100080), (20, 990072), (24, 825060), (30, 660048), (32, 618795), (36, 550040), (40, 495036), (45, 440032), (48, 412530), (60, 330024), (72, 275020), (80, 247518), (90, 220016), (96, 206265), (120, 165012), (144, 137510), (160, 123759), (180, 110008), (240, 82506), (288, 68755), (360, 55004), (480, 41253), (720, 27502), (1440, 13751)]