20955990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{251}}^1$

素因数の和:306

約数の個数: 96

約数和(自身を含む): 57915648

約数和(自身を除く): 36959658

約数列:

[1, 2, 3, 5, 6, 10, 11, 15, 22, 23, 30, 33, 46, 55, 66, 69, 110, 115, 121, 138, 165, 230, 242, 251, 253, 330, 345, 363, 502, 506, 605, 690, 726, 753, 759, 1210, 1255, 1265, 1506, 1518, 1815, 2510, 2530, 2761, 2783, 3630, 3765, 3795, 5522, 5566, 5773, 7530, 7590, 8283, 8349, 11546, 13805, 13915, 16566, 16698, 17319, 27610, 27830, 28865, 30371, 34638, 41415, 41745, 57730, 60742, 63503, 82830, 83490, 86595, 91113, 127006, 151855, 173190, 182226, 190509, 303710, 317515, 381018, 455565, 635030, 698533, 911130, 952545, 1397066, 1905090, 2095599, 3492665, 4191198, 6985330, 10477995, 20955990]

約数ペア:

[(1, 20955990), (2, 10477995), (3, 6985330), (5, 4191198), (6, 3492665), (10, 2095599), (11, 1905090), (15, 1397066), (22, 952545), (23, 911130), (30, 698533), (33, 635030), (46, 455565), (55, 381018), (66, 317515), (69, 303710), (110, 190509), (115, 182226), (121, 173190), (138, 151855), (165, 127006), (230, 91113), (242, 86595), (251, 83490), (253, 82830), (330, 63503), (345, 60742), (363, 57730), (502, 41745), (506, 41415), (605, 34638), (690, 30371), (726, 28865), (753, 27830), (759, 27610), (1210, 17319), (1255, 16698), (1265, 16566), (1506, 13915), (1518, 13805), (1815, 11546), (2510, 8349), (2530, 8283), (2761, 7590), (2783, 7530), (3630, 5773), (3765, 5566), (3795, 5522)]