21871280

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{14389}}^1$

素因数の和:14421

約数の個数: 40

約数和(自身を含む): 53530800

約数和(自身を除く): 31659520

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 14389, 28778, 57556, 71945, 115112, 143890, 230224, 273391, 287780, 546782, 575560, 1093564, 1151120, 1366955, 2187128, 2733910, 4374256, 5467820, 10935640, 21871280]

約数ペア:

[(1, 21871280), (2, 10935640), (4, 5467820), (5, 4374256), (8, 2733910), (10, 2187128), (16, 1366955), (19, 1151120), (20, 1093564), (38, 575560), (40, 546782), (76, 287780), (80, 273391), (95, 230224), (152, 143890), (190, 115112), (304, 71945), (380, 57556), (760, 28778), (1520, 14389)]