20356840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{109}}^1$

素因数の和:179

約数の個数: 128

約数和(自身を含む): 57024000

約数和(自身を除く): 36667160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 23, 28, 29, 35, 40, 46, 56, 58, 70, 92, 109, 115, 116, 140, 145, 161, 184, 203, 218, 230, 232, 280, 290, 322, 406, 436, 460, 545, 580, 644, 667, 763, 805, 812, 872, 920, 1015, 1090, 1160, 1288, 1334, 1526, 1610, 1624, 2030, 2180, 2507, 2668, 3052, 3161, 3220, 3335, 3815, 4060, 4360, 4669, 5014, 5336, 6104, 6322, 6440, 6670, 7630, 8120, 9338, 10028, 12535, 12644, 13340, 15260, 15805, 17549, 18676, 20056, 22127, 23345, 25070, 25288, 26680, 30520, 31610, 35098, 37352, 44254, 46690, 50140, 63220, 70196, 72703, 87745, 88508, 93380, 100280, 110635, 126440, 140392, 145406, 175490, 177016, 186760, 221270, 290812, 350980, 363515, 442540, 508921, 581624, 701960, 727030, 885080, 1017842, 1454060, 2035684, 2544605, 2908120, 4071368, 5089210, 10178420, 20356840]

約数ペア:

[(1, 20356840), (2, 10178420), (4, 5089210), (5, 4071368), (7, 2908120), (8, 2544605), (10, 2035684), (14, 1454060), (20, 1017842), (23, 885080), (28, 727030), (29, 701960), (35, 581624), (40, 508921), (46, 442540), (56, 363515), (58, 350980), (70, 290812), (92, 221270), (109, 186760), (115, 177016), (116, 175490), (140, 145406), (145, 140392), (161, 126440), (184, 110635), (203, 100280), (218, 93380), (230, 88508), (232, 87745), (280, 72703), (290, 70196), (322, 63220), (406, 50140), (436, 46690), (460, 44254), (545, 37352), (580, 35098), (644, 31610), (667, 30520), (763, 26680), (805, 25288), (812, 25070), (872, 23345), (920, 22127), (1015, 20056), (1090, 18676), (1160, 17549), (1288, 15805), (1334, 15260), (1526, 13340), (1610, 12644), (1624, 12535), (2030, 10028), (2180, 9338), (2507, 8120), (2668, 7630), (3052, 6670), (3161, 6440), (3220, 6322), (3335, 6104), (3815, 5336), (4060, 5014), (4360, 4669)]