20455470

素因数分解:

$2^1\times 3^3\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{137}}^1$

素因数の和:239

約数の個数: 128

約数和(自身を含む): 63590400

約数和(自身を除く): 43134930

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 21, 27, 30, 35, 42, 45, 54, 63, 70, 79, 90, 105, 126, 135, 137, 158, 189, 210, 237, 270, 274, 315, 378, 395, 411, 474, 553, 630, 685, 711, 790, 822, 945, 959, 1106, 1185, 1233, 1370, 1422, 1659, 1890, 1918, 2055, 2133, 2370, 2466, 2765, 2877, 3318, 3555, 3699, 4110, 4266, 4795, 4977, 5530, 5754, 6165, 7110, 7398, 8295, 8631, 9590, 9954, 10665, 10823, 12330, 14385, 14931, 16590, 17262, 18495, 21330, 21646, 24885, 25893, 28770, 29862, 32469, 36990, 43155, 49770, 51786, 54115, 64938, 74655, 75761, 86310, 97407, 108230, 129465, 149310, 151522, 162345, 194814, 227283, 258930, 292221, 324690, 378805, 454566, 487035, 584442, 681849, 757610, 974070, 1136415, 1363698, 1461105, 2045547, 2272830, 2922210, 3409245, 4091094, 6818490, 10227735, 20455470]

約数ペア:

[(1, 20455470), (2, 10227735), (3, 6818490), (5, 4091094), (6, 3409245), (7, 2922210), (9, 2272830), (10, 2045547), (14, 1461105), (15, 1363698), (18, 1136415), (21, 974070), (27, 757610), (30, 681849), (35, 584442), (42, 487035), (45, 454566), (54, 378805), (63, 324690), (70, 292221), (79, 258930), (90, 227283), (105, 194814), (126, 162345), (135, 151522), (137, 149310), (158, 129465), (189, 108230), (210, 97407), (237, 86310), (270, 75761), (274, 74655), (315, 64938), (378, 54115), (395, 51786), (411, 49770), (474, 43155), (553, 36990), (630, 32469), (685, 29862), (711, 28770), (790, 25893), (822, 24885), (945, 21646), (959, 21330), (1106, 18495), (1185, 17262), (1233, 16590), (1370, 14931), (1422, 14385), (1659, 12330), (1890, 10823), (1918, 10665), (2055, 9954), (2133, 9590), (2370, 8631), (2466, 8295), (2765, 7398), (2877, 7110), (3318, 6165), (3555, 5754), (3699, 5530), (4110, 4977), (4266, 4795)]