20979666

素因数分解:

$2^1\times 3^2\times {\mathrm{17}}^2\times {\mathrm{37}}^1\times {\mathrm{109}}^1$

素因数の和:188

約数の個数: 72

約数和(自身を含む): 50047140

約数和(自身を除く): 29067474

約数列:

[1, 2, 3, 6, 9, 17, 18, 34, 37, 51, 74, 102, 109, 111, 153, 218, 222, 289, 306, 327, 333, 578, 629, 654, 666, 867, 981, 1258, 1734, 1853, 1887, 1962, 2601, 3706, 3774, 4033, 5202, 5559, 5661, 8066, 10693, 11118, 11322, 12099, 16677, 21386, 24198, 31501, 32079, 33354, 36297, 63002, 64158, 68561, 72594, 94503, 96237, 137122, 189006, 192474, 205683, 283509, 411366, 567018, 617049, 1165537, 1234098, 2331074, 3496611, 6993222, 10489833, 20979666]

約数ペア:

[(1, 20979666), (2, 10489833), (3, 6993222), (6, 3496611), (9, 2331074), (17, 1234098), (18, 1165537), (34, 617049), (37, 567018), (51, 411366), (74, 283509), (102, 205683), (109, 192474), (111, 189006), (153, 137122), (218, 96237), (222, 94503), (289, 72594), (306, 68561), (327, 64158), (333, 63002), (578, 36297), (629, 33354), (654, 32079), (666, 31501), (867, 24198), (981, 21386), (1258, 16677), (1734, 12099), (1853, 11322), (1887, 11118), (1962, 10693), (2601, 8066), (3706, 5661), (3774, 5559), (4033, 5202)]