21579915

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{373}}^1$

素因数の和:436

約数の個数: 64

約数和(自身を含む): 43084800

約数和(自身を除く): 21504885

約数列:

[1, 3, 5, 7, 15, 19, 21, 29, 35, 57, 87, 95, 105, 133, 145, 203, 285, 373, 399, 435, 551, 609, 665, 1015, 1119, 1653, 1865, 1995, 2611, 2755, 3045, 3857, 5595, 7087, 7833, 8265, 10817, 11571, 13055, 19285, 21261, 32451, 35435, 39165, 49609, 54085, 57855, 75719, 106305, 148827, 162255, 205523, 227157, 248045, 378595, 616569, 744135, 1027615, 1135785, 1438661, 3082845, 4315983, 7193305, 21579915]

約数ペア:

[(1, 21579915), (3, 7193305), (5, 4315983), (7, 3082845), (15, 1438661), (19, 1135785), (21, 1027615), (29, 744135), (35, 616569), (57, 378595), (87, 248045), (95, 227157), (105, 205523), (133, 162255), (145, 148827), (203, 106305), (285, 75719), (373, 57855), (399, 54085), (435, 49609), (551, 39165), (609, 35435), (665, 32451), (1015, 21261), (1119, 19285), (1653, 13055), (1865, 11571), (1995, 10817), (2611, 8265), (2755, 7833), (3045, 7087), (3857, 5595)]