20209420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{1193}}^1$

素因数の和:1231

約数の個数: 72

約数和(自身を含む): 53357472

約数和(自身を除く): 33148052

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 121, 140, 154, 220, 242, 308, 385, 484, 605, 770, 847, 1193, 1210, 1540, 1694, 2386, 2420, 3388, 4235, 4772, 5965, 8351, 8470, 11930, 13123, 16702, 16940, 23860, 26246, 33404, 41755, 52492, 65615, 83510, 91861, 131230, 144353, 167020, 183722, 262460, 288706, 367444, 459305, 577412, 721765, 918610, 1010471, 1443530, 1837220, 2020942, 2887060, 4041884, 5052355, 10104710, 20209420]

約数ペア:

[(1, 20209420), (2, 10104710), (4, 5052355), (5, 4041884), (7, 2887060), (10, 2020942), (11, 1837220), (14, 1443530), (20, 1010471), (22, 918610), (28, 721765), (35, 577412), (44, 459305), (55, 367444), (70, 288706), (77, 262460), (110, 183722), (121, 167020), (140, 144353), (154, 131230), (220, 91861), (242, 83510), (308, 65615), (385, 52492), (484, 41755), (605, 33404), (770, 26246), (847, 23860), (1193, 16940), (1210, 16702), (1540, 13123), (1694, 11930), (2386, 8470), (2420, 8351), (3388, 5965), (4235, 4772)]