20954240

素因数分解:

$2^7\times 5^1\times {\mathrm{29}}^1\times {\mathrm{1129}}^1$

素因数の和:1177

約数の個数: 64

約数和(自身を含む): 51867000

約数和(自身を除く): 30912760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 32, 40, 58, 64, 80, 116, 128, 145, 160, 232, 290, 320, 464, 580, 640, 928, 1129, 1160, 1856, 2258, 2320, 3712, 4516, 4640, 5645, 9032, 9280, 11290, 18064, 18560, 22580, 32741, 36128, 45160, 65482, 72256, 90320, 130964, 144512, 163705, 180640, 261928, 327410, 361280, 523856, 654820, 722560, 1047712, 1309640, 2095424, 2619280, 4190848, 5238560, 10477120, 20954240]

約数ペア:

[(1, 20954240), (2, 10477120), (4, 5238560), (5, 4190848), (8, 2619280), (10, 2095424), (16, 1309640), (20, 1047712), (29, 722560), (32, 654820), (40, 523856), (58, 361280), (64, 327410), (80, 261928), (116, 180640), (128, 163705), (145, 144512), (160, 130964), (232, 90320), (290, 72256), (320, 65482), (464, 45160), (580, 36128), (640, 32741), (928, 22580), (1129, 18560), (1160, 18064), (1856, 11290), (2258, 9280), (2320, 9032), (3712, 5645), (4516, 4640)]