28820720

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{283}}^1$

素因数の和:382

約数の個数: 80

約数和(自身を含む): 71840640

約数和(自身を除く): 43019920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 67, 76, 80, 95, 134, 152, 190, 268, 283, 304, 335, 380, 536, 566, 670, 760, 1072, 1132, 1273, 1340, 1415, 1520, 2264, 2546, 2680, 2830, 4528, 5092, 5360, 5377, 5660, 6365, 10184, 10754, 11320, 12730, 18961, 20368, 21508, 22640, 25460, 26885, 37922, 43016, 50920, 53770, 75844, 86032, 94805, 101840, 107540, 151688, 189610, 215080, 303376, 360259, 379220, 430160, 720518, 758440, 1441036, 1516880, 1801295, 2882072, 3602590, 5764144, 7205180, 14410360, 28820720]

約数ペア:

[(1, 28820720), (2, 14410360), (4, 7205180), (5, 5764144), (8, 3602590), (10, 2882072), (16, 1801295), (19, 1516880), (20, 1441036), (38, 758440), (40, 720518), (67, 430160), (76, 379220), (80, 360259), (95, 303376), (134, 215080), (152, 189610), (190, 151688), (268, 107540), (283, 101840), (304, 94805), (335, 86032), (380, 75844), (536, 53770), (566, 50920), (670, 43016), (760, 37922), (1072, 26885), (1132, 25460), (1273, 22640), (1340, 21508), (1415, 20368), (1520, 18961), (2264, 12730), (2546, 11320), (2680, 10754), (2830, 10184), (4528, 6365), (5092, 5660), (5360, 5377)]