19901145

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{1171}}^1$

素因数の和:1293

約数の個数: 32

約数和(自身を含む): 35103744

約数和(自身を除く): 15202599

約数列:

[1, 3, 5, 11, 15, 33, 55, 103, 165, 309, 515, 1133, 1171, 1545, 3399, 3513, 5665, 5855, 12881, 16995, 17565, 38643, 64405, 120613, 193215, 361839, 603065, 1326743, 1809195, 3980229, 6633715, 19901145]

約数ペア:

[(1, 19901145), (3, 6633715), (5, 3980229), (11, 1809195), (15, 1326743), (33, 603065), (55, 361839), (103, 193215), (165, 120613), (309, 64405), (515, 38643), (1133, 17565), (1171, 16995), (1545, 12881), (3399, 5855), (3513, 5665)]