21183520

素因数分解:

$2^5\times 5^1\times {\mathrm{43}}^1\times {\mathrm{3079}}^1$

素因数の和:3137

約数の個数: 48

約数和(自身を含む): 51226560

約数和(自身を除く): 30043040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 43, 80, 86, 160, 172, 215, 344, 430, 688, 860, 1376, 1720, 3079, 3440, 6158, 6880, 12316, 15395, 24632, 30790, 49264, 61580, 98528, 123160, 132397, 246320, 264794, 492640, 529588, 661985, 1059176, 1323970, 2118352, 2647940, 4236704, 5295880, 10591760, 21183520]

約数ペア:

[(1, 21183520), (2, 10591760), (4, 5295880), (5, 4236704), (8, 2647940), (10, 2118352), (16, 1323970), (20, 1059176), (32, 661985), (40, 529588), (43, 492640), (80, 264794), (86, 246320), (160, 132397), (172, 123160), (215, 98528), (344, 61580), (430, 49264), (688, 30790), (860, 24632), (1376, 15395), (1720, 12316), (3079, 6880), (3440, 6158)]