20641280

素因数分解:

$2^9\times 5^1\times {\mathrm{11}}^1\times {\mathrm{733}}^1$

素因数の和:767

約数の個数: 80

約数和(自身を含む): 54063504

約数和(自身を除く): 33422224

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 64, 80, 88, 110, 128, 160, 176, 220, 256, 320, 352, 440, 512, 640, 704, 733, 880, 1280, 1408, 1466, 1760, 2560, 2816, 2932, 3520, 3665, 5632, 5864, 7040, 7330, 8063, 11728, 14080, 14660, 16126, 23456, 28160, 29320, 32252, 40315, 46912, 58640, 64504, 80630, 93824, 117280, 129008, 161260, 187648, 234560, 258016, 322520, 375296, 469120, 516032, 645040, 938240, 1032064, 1290080, 1876480, 2064128, 2580160, 4128256, 5160320, 10320640, 20641280]

約数ペア:

[(1, 20641280), (2, 10320640), (4, 5160320), (5, 4128256), (8, 2580160), (10, 2064128), (11, 1876480), (16, 1290080), (20, 1032064), (22, 938240), (32, 645040), (40, 516032), (44, 469120), (55, 375296), (64, 322520), (80, 258016), (88, 234560), (110, 187648), (128, 161260), (160, 129008), (176, 117280), (220, 93824), (256, 80630), (320, 64504), (352, 58640), (440, 46912), (512, 40315), (640, 32252), (704, 29320), (733, 28160), (880, 23456), (1280, 16126), (1408, 14660), (1466, 14080), (1760, 11728), (2560, 8063), (2816, 7330), (2932, 7040), (3520, 5864), (3665, 5632)]