20688390

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{457}}^1\times {\mathrm{503}}^1$

素因数の和:973

約数の個数: 48

約数和(自身を含む): 54014688

約数和(自身を除く): 33326298

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 457, 503, 914, 1006, 1371, 1509, 2285, 2515, 2742, 3018, 4113, 4527, 4570, 5030, 6855, 7545, 8226, 9054, 13710, 15090, 20565, 22635, 41130, 45270, 229871, 459742, 689613, 1149355, 1379226, 2068839, 2298710, 3448065, 4137678, 6896130, 10344195, 20688390]

約数ペア:

[(1, 20688390), (2, 10344195), (3, 6896130), (5, 4137678), (6, 3448065), (9, 2298710), (10, 2068839), (15, 1379226), (18, 1149355), (30, 689613), (45, 459742), (90, 229871), (457, 45270), (503, 41130), (914, 22635), (1006, 20565), (1371, 15090), (1509, 13710), (2285, 9054), (2515, 8226), (2742, 7545), (3018, 6855), (4113, 5030), (4527, 4570)]