19978972

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{9371}}^1$

素因数の和:9429

約数の個数: 24

約数和(自身を含む): 38575152

約数和(自身を除く): 18596180

約数列:

[1, 2, 4, 13, 26, 41, 52, 82, 164, 533, 1066, 2132, 9371, 18742, 37484, 121823, 243646, 384211, 487292, 768422, 1536844, 4994743, 9989486, 19978972]

約数ペア:

[(1, 19978972), (2, 9989486), (4, 4994743), (13, 1536844), (26, 768422), (41, 487292), (52, 384211), (82, 243646), (164, 121823), (533, 37484), (1066, 18742), (2132, 9371)]