20452520

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1$

素因数の和:135

約数の個数: 128

約数和(自身を含む): 54743040

約数和(自身を除く): 34290520

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 23, 40, 43, 44, 46, 47, 55, 86, 88, 92, 94, 110, 115, 172, 184, 188, 215, 220, 230, 235, 253, 344, 376, 430, 440, 460, 470, 473, 506, 517, 860, 920, 940, 946, 989, 1012, 1034, 1081, 1265, 1720, 1880, 1892, 1978, 2021, 2024, 2068, 2162, 2365, 2530, 2585, 3784, 3956, 4042, 4136, 4324, 4730, 4945, 5060, 5170, 5405, 7912, 8084, 8648, 9460, 9890, 10105, 10120, 10340, 10810, 10879, 11891, 16168, 18920, 19780, 20210, 20680, 21620, 21758, 22231, 23782, 39560, 40420, 43240, 43516, 44462, 46483, 47564, 54395, 59455, 80840, 87032, 88924, 92966, 95128, 108790, 111155, 118910, 177848, 185932, 217580, 222310, 232415, 237820, 371864, 435160, 444620, 464830, 475640, 511313, 889240, 929660, 1022626, 1859320, 2045252, 2556565, 4090504, 5113130, 10226260, 20452520]

約数ペア:

[(1, 20452520), (2, 10226260), (4, 5113130), (5, 4090504), (8, 2556565), (10, 2045252), (11, 1859320), (20, 1022626), (22, 929660), (23, 889240), (40, 511313), (43, 475640), (44, 464830), (46, 444620), (47, 435160), (55, 371864), (86, 237820), (88, 232415), (92, 222310), (94, 217580), (110, 185932), (115, 177848), (172, 118910), (184, 111155), (188, 108790), (215, 95128), (220, 92966), (230, 88924), (235, 87032), (253, 80840), (344, 59455), (376, 54395), (430, 47564), (440, 46483), (460, 44462), (470, 43516), (473, 43240), (506, 40420), (517, 39560), (860, 23782), (920, 22231), (940, 21758), (946, 21620), (989, 20680), (1012, 20210), (1034, 19780), (1081, 18920), (1265, 16168), (1720, 11891), (1880, 10879), (1892, 10810), (1978, 10340), (2021, 10120), (2024, 10105), (2068, 9890), (2162, 9460), (2365, 8648), (2530, 8084), (2585, 7912), (3784, 5405), (3956, 5170), (4042, 5060), (4136, 4945), (4324, 4730)]