128980780

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^2\times {\mathrm{73}}^1\times {\mathrm{167}}^1$

素因数の和:295

約数の個数: 72

約数和(自身を含む): 288745632

約数和(自身を除く): 159764852

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 73, 92, 115, 146, 167, 230, 292, 334, 365, 460, 529, 668, 730, 835, 1058, 1460, 1670, 1679, 2116, 2645, 3340, 3358, 3841, 5290, 6716, 7682, 8395, 10580, 12191, 15364, 16790, 19205, 24382, 33580, 38410, 38617, 48764, 60955, 76820, 77234, 88343, 121910, 154468, 176686, 193085, 243820, 280393, 353372, 386170, 441715, 560786, 772340, 883430, 1121572, 1401965, 1766860, 2803930, 5607860, 6449039, 12898078, 25796156, 32245195, 64490390, 128980780]

約数ペア:

[(1, 128980780), (2, 64490390), (4, 32245195), (5, 25796156), (10, 12898078), (20, 6449039), (23, 5607860), (46, 2803930), (73, 1766860), (92, 1401965), (115, 1121572), (146, 883430), (167, 772340), (230, 560786), (292, 441715), (334, 386170), (365, 353372), (460, 280393), (529, 243820), (668, 193085), (730, 176686), (835, 154468), (1058, 121910), (1460, 88343), (1670, 77234), (1679, 76820), (2116, 60955), (2645, 48764), (3340, 38617), (3358, 38410), (3841, 33580), (5290, 24382), (6716, 19205), (7682, 16790), (8395, 15364), (10580, 12191)]