20682640

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{1237}}^1$

素因数の和:1280

約数の個数: 80

約数和(自身を含む): 55264320

約数和(自身を除く): 34581680

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 19, 20, 22, 38, 40, 44, 55, 76, 80, 88, 95, 110, 152, 176, 190, 209, 220, 304, 380, 418, 440, 760, 836, 880, 1045, 1237, 1520, 1672, 2090, 2474, 3344, 4180, 4948, 6185, 8360, 9896, 12370, 13607, 16720, 19792, 23503, 24740, 27214, 47006, 49480, 54428, 68035, 94012, 98960, 108856, 117515, 136070, 188024, 217712, 235030, 258533, 272140, 376048, 470060, 517066, 544280, 940120, 1034132, 1088560, 1292665, 1880240, 2068264, 2585330, 4136528, 5170660, 10341320, 20682640]

約数ペア:

[(1, 20682640), (2, 10341320), (4, 5170660), (5, 4136528), (8, 2585330), (10, 2068264), (11, 1880240), (16, 1292665), (19, 1088560), (20, 1034132), (22, 940120), (38, 544280), (40, 517066), (44, 470060), (55, 376048), (76, 272140), (80, 258533), (88, 235030), (95, 217712), (110, 188024), (152, 136070), (176, 117515), (190, 108856), (209, 98960), (220, 94012), (304, 68035), (380, 54428), (418, 49480), (440, 47006), (760, 27214), (836, 24740), (880, 23503), (1045, 19792), (1237, 16720), (1520, 13607), (1672, 12370), (2090, 9896), (2474, 8360), (3344, 6185), (4180, 4948)]