399989876

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{53791}}^1$

素因数の和:53832

約数の個数: 36

約数和(自身を含む): 826890624

約数和(自身を除く): 426900748

約数列:

[1, 2, 4, 11, 13, 22, 26, 44, 52, 143, 169, 286, 338, 572, 676, 1859, 3718, 7436, 53791, 107582, 215164, 591701, 699283, 1183402, 1398566, 2366804, 2797132, 7692113, 9090679, 15384226, 18181358, 30768452, 36362716, 99997469, 199994938, 399989876]

約数ペア:

[(1, 399989876), (2, 199994938), (4, 99997469), (11, 36362716), (13, 30768452), (22, 18181358), (26, 15384226), (44, 9090679), (52, 7692113), (143, 2797132), (169, 2366804), (286, 1398566), (338, 1183402), (572, 699283), (676, 591701), (1859, 215164), (3718, 107582), (7436, 53791)]