21558892

素因数分解:

$2^2\times {\mathrm{109}}^1\times {\mathrm{197}}^1\times {\mathrm{251}}^1$

素因数の和:561

約数の個数: 24

約数和(自身を含む): 38419920

約数和(自身を除く): 16861028

約数列:

[1, 2, 4, 109, 197, 218, 251, 394, 436, 502, 788, 1004, 21473, 27359, 42946, 49447, 54718, 85892, 98894, 109436, 197788, 5389723, 10779446, 21558892]

約数ペア:

[(1, 21558892), (2, 10779446), (4, 5389723), (109, 197788), (197, 109436), (218, 98894), (251, 85892), (394, 54718), (436, 49447), (502, 42946), (788, 27359), (1004, 21473)]