20542040

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{151}}^1\times {\mathrm{179}}^1$

素因数の和:360

約数の個数: 64

約数和(自身を含む): 49248000

約数和(自身を除く): 28705960

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 151, 152, 179, 190, 302, 358, 380, 604, 716, 755, 760, 895, 1208, 1432, 1510, 1790, 2869, 3020, 3401, 3580, 5738, 6040, 6802, 7160, 11476, 13604, 14345, 17005, 22952, 27029, 27208, 28690, 34010, 54058, 57380, 68020, 108116, 114760, 135145, 136040, 216232, 270290, 513551, 540580, 1027102, 1081160, 2054204, 2567755, 4108408, 5135510, 10271020, 20542040]

約数ペア:

[(1, 20542040), (2, 10271020), (4, 5135510), (5, 4108408), (8, 2567755), (10, 2054204), (19, 1081160), (20, 1027102), (38, 540580), (40, 513551), (76, 270290), (95, 216232), (151, 136040), (152, 135145), (179, 114760), (190, 108116), (302, 68020), (358, 57380), (380, 54058), (604, 34010), (716, 28690), (755, 27208), (760, 27029), (895, 22952), (1208, 17005), (1432, 14345), (1510, 13604), (1790, 11476), (2869, 7160), (3020, 6802), (3401, 6040), (3580, 5738)]