257468720

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{45329}}^1$

素因数の和:45413

約数の個数: 40

約数和(自身を含む): 607059360

約数和(自身を除く): 349590640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 142, 284, 355, 568, 710, 1136, 1420, 2840, 5680, 45329, 90658, 181316, 226645, 362632, 453290, 725264, 906580, 1813160, 3218359, 3626320, 6436718, 12873436, 16091795, 25746872, 32183590, 51493744, 64367180, 128734360, 257468720]

約数ペア:

[(1, 257468720), (2, 128734360), (4, 64367180), (5, 51493744), (8, 32183590), (10, 25746872), (16, 16091795), (20, 12873436), (40, 6436718), (71, 3626320), (80, 3218359), (142, 1813160), (284, 906580), (355, 725264), (568, 453290), (710, 362632), (1136, 226645), (1420, 181316), (2840, 90658), (5680, 45329)]