20881276

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{227}}^1$

素因数の和:334

約数の個数: 48

約数和(自身を含む): 41559840

約数和(自身を除く): 20678564

約数列:

[1, 2, 4, 13, 26, 29, 52, 58, 61, 116, 122, 227, 244, 377, 454, 754, 793, 908, 1508, 1586, 1769, 2951, 3172, 3538, 5902, 6583, 7076, 11804, 13166, 13847, 22997, 26332, 27694, 45994, 55388, 85579, 91988, 171158, 180011, 342316, 360022, 401563, 720044, 803126, 1606252, 5220319, 10440638, 20881276]

約数ペア:

[(1, 20881276), (2, 10440638), (4, 5220319), (13, 1606252), (26, 803126), (29, 720044), (52, 401563), (58, 360022), (61, 342316), (116, 180011), (122, 171158), (227, 91988), (244, 85579), (377, 55388), (454, 45994), (754, 27694), (793, 26332), (908, 22997), (1508, 13847), (1586, 13166), (1769, 11804), (2951, 7076), (3172, 6583), (3538, 5902)]