21203845

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{619}}^1$

素因数の和:685

約数の個数: 32

約数和(自身を含む): 29998080

約数和(自身を除く): 8794235

約数列:

[1, 5, 13, 17, 31, 65, 85, 155, 221, 403, 527, 619, 1105, 2015, 2635, 3095, 6851, 8047, 10523, 19189, 34255, 40235, 52615, 95945, 136799, 249457, 326213, 683995, 1247285, 1631065, 4240769, 21203845]

約数ペア:

[(1, 21203845), (5, 4240769), (13, 1631065), (17, 1247285), (31, 683995), (65, 326213), (85, 249457), (155, 136799), (221, 95945), (403, 52615), (527, 40235), (619, 34255), (1105, 19189), (2015, 10523), (2635, 8047), (3095, 6851)]