21094840

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{113}}^1\times {\mathrm{359}}^1$

素因数の和:496

約数の個数: 64

約数和(自身を含む): 51710400

約数和(自身を除く): 30615560

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 113, 130, 226, 260, 359, 452, 520, 565, 718, 904, 1130, 1436, 1469, 1795, 2260, 2872, 2938, 3590, 4520, 4667, 5876, 7180, 7345, 9334, 11752, 14360, 14690, 18668, 23335, 29380, 37336, 40567, 46670, 58760, 81134, 93340, 162268, 186680, 202835, 324536, 405670, 527371, 811340, 1054742, 1622680, 2109484, 2636855, 4218968, 5273710, 10547420, 21094840]

約数ペア:

[(1, 21094840), (2, 10547420), (4, 5273710), (5, 4218968), (8, 2636855), (10, 2109484), (13, 1622680), (20, 1054742), (26, 811340), (40, 527371), (52, 405670), (65, 324536), (104, 202835), (113, 186680), (130, 162268), (226, 93340), (260, 81134), (359, 58760), (452, 46670), (520, 40567), (565, 37336), (718, 29380), (904, 23335), (1130, 18668), (1436, 14690), (1469, 14360), (1795, 11752), (2260, 9334), (2872, 7345), (2938, 7180), (3590, 5876), (4520, 4667)]