399715706860

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^2\times {\mathrm{1489}}^1\times {\mathrm{13967}}^1$

素因数の和:15527

約数の個数: 72

約数和(自身を含む): 867998617920

約数和(自身を除く): 468282911060

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 961, 1489, 1922, 2978, 3844, 4805, 5956, 7445, 9610, 13967, 14890, 19220, 27934, 29780, 46159, 55868, 69835, 92318, 139670, 184636, 230795, 279340, 432977, 461590, 865954, 923180, 1430929, 1731908, 2164885, 2861858, 4329770, 5723716, 7154645, 8659540, 13422287, 14309290, 20796863, 26844574, 28618580, 41593726, 53689148, 67111435, 83187452, 103984315, 134222870, 207968630, 268445740, 415937260, 644702753, 1289405506, 2578811012, 3223513765, 6447027530, 12894055060, 19985785343, 39971570686, 79943141372, 99928926715, 199857853430, 399715706860]

約数ペア:

[(1, 399715706860), (2, 199857853430), (4, 99928926715), (5, 79943141372), (10, 39971570686), (20, 19985785343), (31, 12894055060), (62, 6447027530), (124, 3223513765), (155, 2578811012), (310, 1289405506), (620, 644702753), (961, 415937260), (1489, 268445740), (1922, 207968630), (2978, 134222870), (3844, 103984315), (4805, 83187452), (5956, 67111435), (7445, 53689148), (9610, 41593726), (13967, 28618580), (14890, 26844574), (19220, 20796863), (27934, 14309290), (29780, 13422287), (46159, 8659540), (55868, 7154645), (69835, 5723716), (92318, 4329770), (139670, 2861858), (184636, 2164885), (230795, 1731908), (279340, 1430929), (432977, 923180), (461590, 865954)]