81282920

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{1667}}^1$

素因数の和:1754

約数の個数: 64

約数和(自身を含む): 194555520

約数和(自身を除く): 113272600

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 53, 92, 106, 115, 184, 212, 230, 265, 424, 460, 530, 920, 1060, 1219, 1667, 2120, 2438, 3334, 4876, 6095, 6668, 8335, 9752, 12190, 13336, 16670, 24380, 33340, 38341, 48760, 66680, 76682, 88351, 153364, 176702, 191705, 306728, 353404, 383410, 441755, 706808, 766820, 883510, 1533640, 1767020, 2032073, 3534040, 4064146, 8128292, 10160365, 16256584, 20320730, 40641460, 81282920]

約数ペア:

[(1, 81282920), (2, 40641460), (4, 20320730), (5, 16256584), (8, 10160365), (10, 8128292), (20, 4064146), (23, 3534040), (40, 2032073), (46, 1767020), (53, 1533640), (92, 883510), (106, 766820), (115, 706808), (184, 441755), (212, 383410), (230, 353404), (265, 306728), (424, 191705), (460, 176702), (530, 153364), (920, 88351), (1060, 76682), (1219, 66680), (1667, 48760), (2120, 38341), (2438, 33340), (3334, 24380), (4876, 16670), (6095, 13336), (6668, 12190), (8335, 9752)]