81256240

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1$

素因数の和:171

約数の個数: 160

約数和(自身を含む): 219985920

約数和(自身を除く): 138729680

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 23, 26, 40, 43, 46, 52, 65, 79, 80, 86, 92, 104, 115, 130, 158, 172, 184, 208, 215, 230, 260, 299, 316, 344, 368, 395, 430, 460, 520, 559, 598, 632, 688, 790, 860, 920, 989, 1027, 1040, 1118, 1196, 1264, 1495, 1580, 1720, 1817, 1840, 1978, 2054, 2236, 2392, 2795, 2990, 3160, 3397, 3440, 3634, 3956, 4108, 4472, 4784, 4945, 5135, 5590, 5980, 6320, 6794, 7268, 7912, 8216, 8944, 9085, 9890, 10270, 11180, 11960, 12857, 13588, 14536, 15824, 16432, 16985, 18170, 19780, 20540, 22360, 23621, 23920, 25714, 27176, 29072, 33970, 36340, 39560, 41080, 44161, 44720, 47242, 51428, 54352, 64285, 67940, 72680, 78131, 79120, 82160, 88322, 94484, 102856, 118105, 128570, 135880, 145360, 156262, 176644, 188968, 205712, 220805, 236210, 257140, 271760, 312524, 353288, 377936, 390655, 441610, 472420, 514280, 625048, 706576, 781310, 883220, 944840, 1015703, 1028560, 1250096, 1562620, 1766440, 1889680, 2031406, 3125240, 3532880, 4062812, 5078515, 6250480, 8125624, 10157030, 16251248, 20314060, 40628120, 81256240]

約数ペア:

[(1, 81256240), (2, 40628120), (4, 20314060), (5, 16251248), (8, 10157030), (10, 8125624), (13, 6250480), (16, 5078515), (20, 4062812), (23, 3532880), (26, 3125240), (40, 2031406), (43, 1889680), (46, 1766440), (52, 1562620), (65, 1250096), (79, 1028560), (80, 1015703), (86, 944840), (92, 883220), (104, 781310), (115, 706576), (130, 625048), (158, 514280), (172, 472420), (184, 441610), (208, 390655), (215, 377936), (230, 353288), (260, 312524), (299, 271760), (316, 257140), (344, 236210), (368, 220805), (395, 205712), (430, 188968), (460, 176644), (520, 156262), (559, 145360), (598, 135880), (632, 128570), (688, 118105), (790, 102856), (860, 94484), (920, 88322), (989, 82160), (1027, 79120), (1040, 78131), (1118, 72680), (1196, 67940), (1264, 64285), (1495, 54352), (1580, 51428), (1720, 47242), (1817, 44720), (1840, 44161), (1978, 41080), (2054, 39560), (2236, 36340), (2392, 33970), (2795, 29072), (2990, 27176), (3160, 25714), (3397, 23920), (3440, 23621), (3634, 22360), (3956, 20540), (4108, 19780), (4472, 18170), (4784, 16985), (4945, 16432), (5135, 15824), (5590, 14536), (5980, 13588), (6320, 12857), (6794, 11960), (7268, 11180), (7912, 10270), (8216, 9890), (8944, 9085)]