81990480

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{2389}}^1$

素因数の和:2429

約数の個数: 160

約数和(自身を含む): 298730880

約数和(自身を除く): 216740400

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 13, 15, 16, 20, 22, 24, 26, 30, 33, 39, 40, 44, 48, 52, 55, 60, 65, 66, 78, 80, 88, 104, 110, 120, 130, 132, 143, 156, 165, 176, 195, 208, 220, 240, 260, 264, 286, 312, 330, 390, 429, 440, 520, 528, 572, 624, 660, 715, 780, 858, 880, 1040, 1144, 1320, 1430, 1560, 1716, 2145, 2288, 2389, 2640, 2860, 3120, 3432, 4290, 4778, 5720, 6864, 7167, 8580, 9556, 11440, 11945, 14334, 17160, 19112, 23890, 26279, 28668, 31057, 34320, 35835, 38224, 47780, 52558, 57336, 62114, 71670, 78837, 93171, 95560, 105116, 114672, 124228, 131395, 143340, 155285, 157674, 186342, 191120, 210232, 248456, 262790, 286680, 310570, 315348, 341627, 372684, 394185, 420464, 465855, 496912, 525580, 573360, 621140, 630696, 683254, 745368, 788370, 931710, 1024881, 1051160, 1242280, 1261392, 1366508, 1490736, 1576740, 1708135, 1863420, 2049762, 2102320, 2484560, 2733016, 3153480, 3416270, 3726840, 4099524, 5124405, 5466032, 6306960, 6832540, 7453680, 8199048, 10248810, 13665080, 16398096, 20497620, 27330160, 40995240, 81990480]

約数ペア:

[(1, 81990480), (2, 40995240), (3, 27330160), (4, 20497620), (5, 16398096), (6, 13665080), (8, 10248810), (10, 8199048), (11, 7453680), (12, 6832540), (13, 6306960), (15, 5466032), (16, 5124405), (20, 4099524), (22, 3726840), (24, 3416270), (26, 3153480), (30, 2733016), (33, 2484560), (39, 2102320), (40, 2049762), (44, 1863420), (48, 1708135), (52, 1576740), (55, 1490736), (60, 1366508), (65, 1261392), (66, 1242280), (78, 1051160), (80, 1024881), (88, 931710), (104, 788370), (110, 745368), (120, 683254), (130, 630696), (132, 621140), (143, 573360), (156, 525580), (165, 496912), (176, 465855), (195, 420464), (208, 394185), (220, 372684), (240, 341627), (260, 315348), (264, 310570), (286, 286680), (312, 262790), (330, 248456), (390, 210232), (429, 191120), (440, 186342), (520, 157674), (528, 155285), (572, 143340), (624, 131395), (660, 124228), (715, 114672), (780, 105116), (858, 95560), (880, 93171), (1040, 78837), (1144, 71670), (1320, 62114), (1430, 57336), (1560, 52558), (1716, 47780), (2145, 38224), (2288, 35835), (2389, 34320), (2640, 31057), (2860, 28668), (3120, 26279), (3432, 23890), (4290, 19112), (4778, 17160), (5720, 14334), (6864, 11945), (7167, 11440), (8580, 9556)]