18998512

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{241}}^1\times {\mathrm{379}}^1$

素因数の和:641

約数の個数: 40

約数和(自身を含む): 39910640

約数和(自身を除く): 20912128

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 241, 379, 482, 758, 964, 1516, 1928, 3032, 3133, 3856, 4927, 6064, 6266, 9854, 12532, 19708, 25064, 39416, 50128, 78832, 91339, 182678, 365356, 730712, 1187407, 1461424, 2374814, 4749628, 9499256, 18998512]

約数ペア:

[(1, 18998512), (2, 9499256), (4, 4749628), (8, 2374814), (13, 1461424), (16, 1187407), (26, 730712), (52, 365356), (104, 182678), (208, 91339), (241, 78832), (379, 50128), (482, 39416), (758, 25064), (964, 19708), (1516, 12532), (1928, 9854), (3032, 6266), (3133, 6064), (3856, 4927)]