21547760

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20719}}^1$

素因数の和:20745

約数の個数: 40

約数和(自身を含む): 53954880

約数和(自身を除く): 32407120

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 20719, 41438, 82876, 103595, 165752, 207190, 269347, 331504, 414380, 538694, 828760, 1077388, 1346735, 1657520, 2154776, 2693470, 4309552, 5386940, 10773880, 21547760]

約数ペア:

[(1, 21547760), (2, 10773880), (4, 5386940), (5, 4309552), (8, 2693470), (10, 2154776), (13, 1657520), (16, 1346735), (20, 1077388), (26, 828760), (40, 538694), (52, 414380), (65, 331504), (80, 269347), (104, 207190), (130, 165752), (208, 103595), (260, 82876), (520, 41438), (1040, 20719)]