81407920

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{1171}}^1$

素因数の和:1274

約数の個数: 80

約数和(自身を含む): 209272320

約数和(自身を除く): 127864400

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 79, 80, 88, 110, 158, 176, 220, 316, 395, 440, 632, 790, 869, 880, 1171, 1264, 1580, 1738, 2342, 3160, 3476, 4345, 4684, 5855, 6320, 6952, 8690, 9368, 11710, 12881, 13904, 17380, 18736, 23420, 25762, 34760, 46840, 51524, 64405, 69520, 92509, 93680, 103048, 128810, 185018, 206096, 257620, 370036, 462545, 515240, 740072, 925090, 1017599, 1030480, 1480144, 1850180, 2035198, 3700360, 4070396, 5087995, 7400720, 8140792, 10175990, 16281584, 20351980, 40703960, 81407920]

約数ペア:

[(1, 81407920), (2, 40703960), (4, 20351980), (5, 16281584), (8, 10175990), (10, 8140792), (11, 7400720), (16, 5087995), (20, 4070396), (22, 3700360), (40, 2035198), (44, 1850180), (55, 1480144), (79, 1030480), (80, 1017599), (88, 925090), (110, 740072), (158, 515240), (176, 462545), (220, 370036), (316, 257620), (395, 206096), (440, 185018), (632, 128810), (790, 103048), (869, 93680), (880, 92509), (1171, 69520), (1264, 64405), (1580, 51524), (1738, 46840), (2342, 34760), (3160, 25762), (3476, 23420), (4345, 18736), (4684, 17380), (5855, 13904), (6320, 12881), (6952, 11710), (8690, 9368)]