20880640

素因数分解:

$2^8\times 5^1\times {\mathrm{11}}^1\times {\mathrm{1483}}^1$

素因数の和:1515

約数の個数: 72

約数和(自身を含む): 54599328

約数和(自身を除く): 33718688

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, 640, 704, 880, 1280, 1408, 1483, 1760, 2816, 2966, 3520, 5932, 7040, 7415, 11864, 14080, 14830, 16313, 23728, 29660, 32626, 47456, 59320, 65252, 81565, 94912, 118640, 130504, 163130, 189824, 237280, 261008, 326260, 379648, 474560, 522016, 652520, 949120, 1044032, 1305040, 1898240, 2088064, 2610080, 4176128, 5220160, 10440320, 20880640]

約数ペア:

[(1, 20880640), (2, 10440320), (4, 5220160), (5, 4176128), (8, 2610080), (10, 2088064), (11, 1898240), (16, 1305040), (20, 1044032), (22, 949120), (32, 652520), (40, 522016), (44, 474560), (55, 379648), (64, 326260), (80, 261008), (88, 237280), (110, 189824), (128, 163130), (160, 130504), (176, 118640), (220, 94912), (256, 81565), (320, 65252), (352, 59320), (440, 47456), (640, 32626), (704, 29660), (880, 23728), (1280, 16313), (1408, 14830), (1483, 14080), (1760, 11864), (2816, 7415), (2966, 7040), (3520, 5932)]