20583680

素因数分解:

$2^8\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1237}}^1$

素因数の和:1271

約数の個数: 72

約数和(自身を含む): 53139912

約数和(自身を除く): 32556232

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 256, 260, 320, 416, 520, 640, 832, 1040, 1237, 1280, 1664, 2080, 2474, 3328, 4160, 4948, 6185, 8320, 9896, 12370, 16081, 16640, 19792, 24740, 32162, 39584, 49480, 64324, 79168, 80405, 98960, 128648, 158336, 160810, 197920, 257296, 316672, 321620, 395840, 514592, 643240, 791680, 1029184, 1286480, 1583360, 2058368, 2572960, 4116736, 5145920, 10291840, 20583680]

約数ペア:

[(1, 20583680), (2, 10291840), (4, 5145920), (5, 4116736), (8, 2572960), (10, 2058368), (13, 1583360), (16, 1286480), (20, 1029184), (26, 791680), (32, 643240), (40, 514592), (52, 395840), (64, 321620), (65, 316672), (80, 257296), (104, 197920), (128, 160810), (130, 158336), (160, 128648), (208, 98960), (256, 80405), (260, 79168), (320, 64324), (416, 49480), (520, 39584), (640, 32162), (832, 24740), (1040, 19792), (1237, 16640), (1280, 16081), (1664, 12370), (2080, 9896), (2474, 8320), (3328, 6185), (4160, 4948)]