20957770

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1$

素因数の和:175

約数の個数: 64

約数和(自身を含む): 42425856

約数和(自身を除く): 21468086

約数列:

[1, 2, 5, 10, 17, 34, 43, 47, 61, 85, 86, 94, 122, 170, 215, 235, 305, 430, 470, 610, 731, 799, 1037, 1462, 1598, 2021, 2074, 2623, 2867, 3655, 3995, 4042, 5185, 5246, 5734, 7310, 7990, 10105, 10370, 13115, 14335, 20210, 26230, 28670, 34357, 44591, 48739, 68714, 89182, 97478, 123281, 171785, 222955, 243695, 246562, 343570, 445910, 487390, 616405, 1232810, 2095777, 4191554, 10478885, 20957770]

約数ペア:

[(1, 20957770), (2, 10478885), (5, 4191554), (10, 2095777), (17, 1232810), (34, 616405), (43, 487390), (47, 445910), (61, 343570), (85, 246562), (86, 243695), (94, 222955), (122, 171785), (170, 123281), (215, 97478), (235, 89182), (305, 68714), (430, 48739), (470, 44591), (610, 34357), (731, 28670), (799, 26230), (1037, 20210), (1462, 14335), (1598, 13115), (2021, 10370), (2074, 10105), (2623, 7990), (2867, 7310), (3655, 5734), (3995, 5246), (4042, 5185)]