20765840

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{15269}}^1$

素因数の和:15299

約数の個数: 40

約数和(自身を含む): 51123960

約数和(自身を除く): 30358120

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 15269, 30538, 61076, 76345, 122152, 152690, 244304, 259573, 305380, 519146, 610760, 1038292, 1221520, 1297865, 2076584, 2595730, 4153168, 5191460, 10382920, 20765840]

約数ペア:

[(1, 20765840), (2, 10382920), (4, 5191460), (5, 4153168), (8, 2595730), (10, 2076584), (16, 1297865), (17, 1221520), (20, 1038292), (34, 610760), (40, 519146), (68, 305380), (80, 259573), (85, 244304), (136, 152690), (170, 122152), (272, 76345), (340, 61076), (680, 30538), (1360, 15269)]