81356520

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{4211}}^1$

素因数の和:4255

約数の個数: 128

約数和(自身を含む): 291133440

約数和(自身を除く): 209776920

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 23, 24, 28, 30, 35, 40, 42, 46, 56, 60, 69, 70, 84, 92, 105, 115, 120, 138, 140, 161, 168, 184, 210, 230, 276, 280, 322, 345, 420, 460, 483, 552, 644, 690, 805, 840, 920, 966, 1288, 1380, 1610, 1932, 2415, 2760, 3220, 3864, 4211, 4830, 6440, 8422, 9660, 12633, 16844, 19320, 21055, 25266, 29477, 33688, 42110, 50532, 58954, 63165, 84220, 88431, 96853, 101064, 117908, 126330, 147385, 168440, 176862, 193706, 235816, 252660, 290559, 294770, 353724, 387412, 442155, 484265, 505320, 581118, 589540, 677971, 707448, 774824, 884310, 968530, 1162236, 1179080, 1355942, 1452795, 1768620, 1937060, 2033913, 2324472, 2711884, 2905590, 3389855, 3537240, 3874120, 4067826, 5423768, 5811180, 6779710, 8135652, 10169565, 11622360, 13559420, 16271304, 20339130, 27118840, 40678260, 81356520]

約数ペア:

[(1, 81356520), (2, 40678260), (3, 27118840), (4, 20339130), (5, 16271304), (6, 13559420), (7, 11622360), (8, 10169565), (10, 8135652), (12, 6779710), (14, 5811180), (15, 5423768), (20, 4067826), (21, 3874120), (23, 3537240), (24, 3389855), (28, 2905590), (30, 2711884), (35, 2324472), (40, 2033913), (42, 1937060), (46, 1768620), (56, 1452795), (60, 1355942), (69, 1179080), (70, 1162236), (84, 968530), (92, 884310), (105, 774824), (115, 707448), (120, 677971), (138, 589540), (140, 581118), (161, 505320), (168, 484265), (184, 442155), (210, 387412), (230, 353724), (276, 294770), (280, 290559), (322, 252660), (345, 235816), (420, 193706), (460, 176862), (483, 168440), (552, 147385), (644, 126330), (690, 117908), (805, 101064), (840, 96853), (920, 88431), (966, 84220), (1288, 63165), (1380, 58954), (1610, 50532), (1932, 42110), (2415, 33688), (2760, 29477), (3220, 25266), (3864, 21055), (4211, 19320), (4830, 16844), (6440, 12633), (8422, 9660)]