20017360

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^2\times {\mathrm{43}}^1$

素因数の和:113

約数の個数: 120

約数和(自身を含む): 54309024

約数和(自身を除く): 34291664

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 23, 40, 43, 44, 46, 55, 80, 86, 88, 92, 110, 115, 172, 176, 184, 215, 220, 230, 253, 344, 368, 430, 440, 460, 473, 506, 529, 688, 860, 880, 920, 946, 989, 1012, 1058, 1265, 1720, 1840, 1892, 1978, 2024, 2116, 2365, 2530, 2645, 3440, 3784, 3956, 4048, 4232, 4730, 4945, 5060, 5290, 5819, 7568, 7912, 8464, 9460, 9890, 10120, 10580, 10879, 11638, 15824, 18920, 19780, 20240, 21160, 21758, 22747, 23276, 29095, 37840, 39560, 42320, 43516, 45494, 46552, 54395, 58190, 79120, 87032, 90988, 93104, 108790, 113735, 116380, 174064, 181976, 217580, 227470, 232760, 250217, 363952, 435160, 454940, 465520, 500434, 870320, 909880, 1000868, 1251085, 1819760, 2001736, 2502170, 4003472, 5004340, 10008680, 20017360]

約数ペア:

[(1, 20017360), (2, 10008680), (4, 5004340), (5, 4003472), (8, 2502170), (10, 2001736), (11, 1819760), (16, 1251085), (20, 1000868), (22, 909880), (23, 870320), (40, 500434), (43, 465520), (44, 454940), (46, 435160), (55, 363952), (80, 250217), (86, 232760), (88, 227470), (92, 217580), (110, 181976), (115, 174064), (172, 116380), (176, 113735), (184, 108790), (215, 93104), (220, 90988), (230, 87032), (253, 79120), (344, 58190), (368, 54395), (430, 46552), (440, 45494), (460, 43516), (473, 42320), (506, 39560), (529, 37840), (688, 29095), (860, 23276), (880, 22747), (920, 21758), (946, 21160), (989, 20240), (1012, 19780), (1058, 18920), (1265, 15824), (1720, 11638), (1840, 10879), (1892, 10580), (1978, 10120), (2024, 9890), (2116, 9460), (2365, 8464), (2530, 7912), (2645, 7568), (3440, 5819), (3784, 5290), (3956, 5060), (4048, 4945), (4232, 4730)]