21093890

素因数分解:

$2^1\times 5^1\times {\mathrm{89}}^1\times {\mathrm{137}}^1\times {\mathrm{173}}^1$

素因数の和:406

約数の個数: 32

約数和(自身を含む): 38899440

約数和(自身を除く): 17805550

約数列:

[1, 2, 5, 10, 89, 137, 173, 178, 274, 346, 445, 685, 865, 890, 1370, 1730, 12193, 15397, 23701, 24386, 30794, 47402, 60965, 76985, 118505, 121930, 153970, 237010, 2109389, 4218778, 10546945, 21093890]

約数ペア:

[(1, 21093890), (2, 10546945), (5, 4218778), (10, 2109389), (89, 237010), (137, 153970), (173, 121930), (178, 118505), (274, 76985), (346, 60965), (445, 47402), (685, 30794), (865, 24386), (890, 23701), (1370, 15397), (1730, 12193)]