18656680

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{2897}}^1$

素因数の和:2938

約数の個数: 64

約数和(自身を含む): 50077440

約数和(自身を除く): 31420760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 23, 28, 35, 40, 46, 56, 70, 92, 115, 140, 161, 184, 230, 280, 322, 460, 644, 805, 920, 1288, 1610, 2897, 3220, 5794, 6440, 11588, 14485, 20279, 23176, 28970, 40558, 57940, 66631, 81116, 101395, 115880, 133262, 162232, 202790, 266524, 333155, 405580, 466417, 533048, 666310, 811160, 932834, 1332620, 1865668, 2332085, 2665240, 3731336, 4664170, 9328340, 18656680]

約数ペア:

[(1, 18656680), (2, 9328340), (4, 4664170), (5, 3731336), (7, 2665240), (8, 2332085), (10, 1865668), (14, 1332620), (20, 932834), (23, 811160), (28, 666310), (35, 533048), (40, 466417), (46, 405580), (56, 333155), (70, 266524), (92, 202790), (115, 162232), (140, 133262), (161, 115880), (184, 101395), (230, 81116), (280, 66631), (322, 57940), (460, 40558), (644, 28970), (805, 23176), (920, 20279), (1288, 14485), (1610, 11588), (2897, 6440), (3220, 5794)]