19687984

素因数分解:

$2^4\times {\mathrm{29}}^1\times {\mathrm{151}}^1\times {\mathrm{281}}^1$

素因数の和:469

約数の個数: 40

約数和(自身を含む): 39863520

約数和(自身を除く): 20175536

約数列:

[1, 2, 4, 8, 16, 29, 58, 116, 151, 232, 281, 302, 464, 562, 604, 1124, 1208, 2248, 2416, 4379, 4496, 8149, 8758, 16298, 17516, 32596, 35032, 42431, 65192, 70064, 84862, 130384, 169724, 339448, 678896, 1230499, 2460998, 4921996, 9843992, 19687984]

約数ペア:

[(1, 19687984), (2, 9843992), (4, 4921996), (8, 2460998), (16, 1230499), (29, 678896), (58, 339448), (116, 169724), (151, 130384), (232, 84862), (281, 70064), (302, 65192), (464, 42431), (562, 35032), (604, 32596), (1124, 17516), (1208, 16298), (2248, 8758), (2416, 8149), (4379, 4496)]