20520

素因数分解:

$2^3\times 3^3\times 5^1\times {\mathrm{19}}^1$

素因数の和:39

約数の個数: 64

約数和(自身を含む): 72000

約数和(自身を除く): 51480

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 19, 20, 24, 27, 30, 36, 38, 40, 45, 54, 57, 60, 72, 76, 90, 95, 108, 114, 120, 135, 152, 171, 180, 190, 216, 228, 270, 285, 342, 360, 380, 456, 513, 540, 570, 684, 760, 855, 1026, 1080, 1140, 1368, 1710, 2052, 2280, 2565, 3420, 4104, 5130, 6840, 10260, 20520]

約数ペア:

[(1, 20520), (2, 10260), (3, 6840), (4, 5130), (5, 4104), (6, 3420), (8, 2565), (9, 2280), (10, 2052), (12, 1710), (15, 1368), (18, 1140), (19, 1080), (20, 1026), (24, 855), (27, 760), (30, 684), (36, 570), (38, 540), (40, 513), (45, 456), (54, 380), (57, 360), (60, 342), (72, 285), (76, 270), (90, 228), (95, 216), (108, 190), (114, 180), (120, 171), (135, 152)]