19911883970

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{701}}^1\times {\mathrm{3637}}^1$

素因数の和:4427

約数の個数: 64

約数和(自身を含む): 39717879552

約数和(自身を除く): 19805995582

約数列:

[1, 2, 5, 10, 11, 22, 55, 71, 110, 142, 355, 701, 710, 781, 1402, 1562, 3505, 3637, 3905, 7010, 7274, 7711, 7810, 15422, 18185, 36370, 38555, 40007, 49771, 77110, 80014, 99542, 200035, 248855, 258227, 400070, 497710, 516454, 547481, 1094962, 1291135, 2549537, 2582270, 2737405, 2840497, 5099074, 5474810, 5680994, 12747685, 14202485, 25495370, 28044907, 28404970, 56089814, 140224535, 181017127, 280449070, 362034254, 905085635, 1810171270, 1991188397, 3982376794, 9955941985, 19911883970]

約数ペア:

[(1, 19911883970), (2, 9955941985), (5, 3982376794), (10, 1991188397), (11, 1810171270), (22, 905085635), (55, 362034254), (71, 280449070), (110, 181017127), (142, 140224535), (355, 56089814), (701, 28404970), (710, 28044907), (781, 25495370), (1402, 14202485), (1562, 12747685), (3505, 5680994), (3637, 5474810), (3905, 5099074), (7010, 2840497), (7274, 2737405), (7711, 2582270), (7810, 2549537), (15422, 1291135), (18185, 1094962), (36370, 547481), (38555, 516454), (40007, 497710), (49771, 400070), (77110, 258227), (80014, 248855), (99542, 200035)]