20319705

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{251}}^1\times {\mathrm{257}}^1$

素因数の和:526

約数の個数: 48

約数和(自身を含む): 40569984

約数和(自身を除く): 20250279

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 251, 257, 315, 753, 771, 1255, 1285, 1757, 1799, 2259, 2313, 3765, 3855, 5271, 5397, 8785, 8995, 11295, 11565, 15813, 16191, 26355, 26985, 64507, 79065, 80955, 193521, 322535, 451549, 580563, 967605, 1354647, 2257745, 2902815, 4063941, 6773235, 20319705]

約数ペア:

[(1, 20319705), (3, 6773235), (5, 4063941), (7, 2902815), (9, 2257745), (15, 1354647), (21, 967605), (35, 580563), (45, 451549), (63, 322535), (105, 193521), (251, 80955), (257, 79065), (315, 64507), (753, 26985), (771, 26355), (1255, 16191), (1285, 15813), (1757, 11565), (1799, 11295), (2259, 8995), (2313, 8785), (3765, 5397), (3855, 5271)]