21156560

素因数分解:

$2^4\times 5^1\times {\mathrm{373}}^1\times {\mathrm{709}}^1$

素因数の和:1095

約数の個数: 40

約数和(自身を含む): 49390440

約数和(自身を除く): 28233880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 373, 709, 746, 1418, 1492, 1865, 2836, 2984, 3545, 3730, 5672, 5968, 7090, 7460, 11344, 14180, 14920, 28360, 29840, 56720, 264457, 528914, 1057828, 1322285, 2115656, 2644570, 4231312, 5289140, 10578280, 21156560]

約数ペア:

[(1, 21156560), (2, 10578280), (4, 5289140), (5, 4231312), (8, 2644570), (10, 2115656), (16, 1322285), (20, 1057828), (40, 528914), (80, 264457), (373, 56720), (709, 29840), (746, 28360), (1418, 14920), (1492, 14180), (1865, 11344), (2836, 7460), (2984, 7090), (3545, 5968), (3730, 5672)]