20990640

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{7951}}^1$

素因数の和:7978

約数の個数: 80

約数和(自身を含む): 70995456

約数和(自身を除く): 50004816

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 16, 20, 22, 24, 30, 33, 40, 44, 48, 55, 60, 66, 80, 88, 110, 120, 132, 165, 176, 220, 240, 264, 330, 440, 528, 660, 880, 1320, 2640, 7951, 15902, 23853, 31804, 39755, 47706, 63608, 79510, 87461, 95412, 119265, 127216, 159020, 174922, 190824, 238530, 262383, 318040, 349844, 381648, 437305, 477060, 524766, 636080, 699688, 874610, 954120, 1049532, 1311915, 1399376, 1749220, 1908240, 2099064, 2623830, 3498440, 4198128, 5247660, 6996880, 10495320, 20990640]

約数ペア:

[(1, 20990640), (2, 10495320), (3, 6996880), (4, 5247660), (5, 4198128), (6, 3498440), (8, 2623830), (10, 2099064), (11, 1908240), (12, 1749220), (15, 1399376), (16, 1311915), (20, 1049532), (22, 954120), (24, 874610), (30, 699688), (33, 636080), (40, 524766), (44, 477060), (48, 437305), (55, 381648), (60, 349844), (66, 318040), (80, 262383), (88, 238530), (110, 190824), (120, 174922), (132, 159020), (165, 127216), (176, 119265), (220, 95412), (240, 87461), (264, 79510), (330, 63608), (440, 47706), (528, 39755), (660, 31804), (880, 23853), (1320, 15902), (2640, 7951)]