20902185

素因数分解:

$3^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{281}}^1$

素因数の和:343

約数の個数: 64

約数和(自身を含む): 40608000

約数和(自身を除く): 19705815

約数列:

[1, 3, 5, 9, 15, 19, 27, 29, 45, 57, 87, 95, 135, 145, 171, 261, 281, 285, 435, 513, 551, 783, 843, 855, 1305, 1405, 1653, 2529, 2565, 2755, 3915, 4215, 4959, 5339, 7587, 8149, 8265, 12645, 14877, 16017, 24447, 24795, 26695, 37935, 40745, 48051, 73341, 74385, 80085, 122235, 144153, 154831, 220023, 240255, 366705, 464493, 720765, 774155, 1100115, 1393479, 2322465, 4180437, 6967395, 20902185]

約数ペア:

[(1, 20902185), (3, 6967395), (5, 4180437), (9, 2322465), (15, 1393479), (19, 1100115), (27, 774155), (29, 720765), (45, 464493), (57, 366705), (87, 240255), (95, 220023), (135, 154831), (145, 144153), (171, 122235), (261, 80085), (281, 74385), (285, 73341), (435, 48051), (513, 40745), (551, 37935), (783, 26695), (843, 24795), (855, 24447), (1305, 16017), (1405, 14877), (1653, 12645), (2529, 8265), (2565, 8149), (2755, 7587), (3915, 5339), (4215, 4959)]