20138540

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{971}}^1$

素因数の和:1058

約数の個数: 48

約数和(自身を含む): 45559584

約数和(自身を除く): 25421044

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 61, 68, 85, 122, 170, 244, 305, 340, 610, 971, 1037, 1220, 1942, 2074, 3884, 4148, 4855, 5185, 9710, 10370, 16507, 19420, 20740, 33014, 59231, 66028, 82535, 118462, 165070, 236924, 296155, 330140, 592310, 1006927, 1184620, 2013854, 4027708, 5034635, 10069270, 20138540]

約数ペア:

[(1, 20138540), (2, 10069270), (4, 5034635), (5, 4027708), (10, 2013854), (17, 1184620), (20, 1006927), (34, 592310), (61, 330140), (68, 296155), (85, 236924), (122, 165070), (170, 118462), (244, 82535), (305, 66028), (340, 59231), (610, 33014), (971, 20740), (1037, 19420), (1220, 16507), (1942, 10370), (2074, 9710), (3884, 5185), (4148, 4855)]