281980400

素因数分解:

$2^4\times 5^2\times {\mathrm{13}}^1\times {\mathrm{211}}^1\times {\mathrm{257}}^1$

素因数の和:499

約数の個数: 120

約数和(自身を含む): 735879984

約数和(自身を除く): 453899584

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 40, 50, 52, 65, 80, 100, 104, 130, 200, 208, 211, 257, 260, 325, 400, 422, 514, 520, 650, 844, 1028, 1040, 1055, 1285, 1300, 1688, 2056, 2110, 2570, 2600, 2743, 3341, 3376, 4112, 4220, 5140, 5200, 5275, 5486, 6425, 6682, 8440, 10280, 10550, 10972, 12850, 13364, 13715, 16705, 16880, 20560, 21100, 21944, 25700, 26728, 27430, 33410, 42200, 43888, 51400, 53456, 54227, 54860, 66820, 68575, 83525, 84400, 102800, 108454, 109720, 133640, 137150, 167050, 216908, 219440, 267280, 271135, 274300, 334100, 433816, 542270, 548600, 668200, 704951, 867632, 1084540, 1097200, 1336400, 1355675, 1409902, 2169080, 2711350, 2819804, 3524755, 4338160, 5422700, 5639608, 7049510, 10845400, 11279216, 14099020, 17623775, 21690800, 28198040, 35247550, 56396080, 70495100, 140990200, 281980400]

約数ペア:

[(1, 281980400), (2, 140990200), (4, 70495100), (5, 56396080), (8, 35247550), (10, 28198040), (13, 21690800), (16, 17623775), (20, 14099020), (25, 11279216), (26, 10845400), (40, 7049510), (50, 5639608), (52, 5422700), (65, 4338160), (80, 3524755), (100, 2819804), (104, 2711350), (130, 2169080), (200, 1409902), (208, 1355675), (211, 1336400), (257, 1097200), (260, 1084540), (325, 867632), (400, 704951), (422, 668200), (514, 548600), (520, 542270), (650, 433816), (844, 334100), (1028, 274300), (1040, 271135), (1055, 267280), (1285, 219440), (1300, 216908), (1688, 167050), (2056, 137150), (2110, 133640), (2570, 109720), (2600, 108454), (2743, 102800), (3341, 84400), (3376, 83525), (4112, 68575), (4220, 66820), (5140, 54860), (5200, 54227), (5275, 53456), (5486, 51400), (6425, 43888), (6682, 42200), (8440, 33410), (10280, 27430), (10550, 26728), (10972, 25700), (12850, 21944), (13364, 21100), (13715, 20560), (16705, 16880)]