20108972

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{151}}^1\times {\mathrm{197}}^1$

素因数の和:378

約数の個数: 36

約数和(自身を含む): 38552976

約数和(自身を除く): 18444004

約数列:

[1, 2, 4, 13, 26, 52, 151, 169, 197, 302, 338, 394, 604, 676, 788, 1963, 2561, 3926, 5122, 7852, 10244, 25519, 29747, 33293, 51038, 59494, 66586, 102076, 118988, 133172, 386711, 773422, 1546844, 5027243, 10054486, 20108972]

約数ペア:

[(1, 20108972), (2, 10054486), (4, 5027243), (13, 1546844), (26, 773422), (52, 386711), (151, 133172), (169, 118988), (197, 102076), (302, 66586), (338, 59494), (394, 51038), (604, 33293), (676, 29747), (788, 25519), (1963, 10244), (2561, 7852), (3926, 5122)]