21864820

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{163}}^1\times {\mathrm{353}}^1$

素因数の和:544

約数の個数: 48

約数和(自身を含む): 48767040

約数和(自身を除く): 26902220

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 163, 190, 326, 353, 380, 652, 706, 815, 1412, 1630, 1765, 3097, 3260, 3530, 6194, 6707, 7060, 12388, 13414, 15485, 26828, 30970, 33535, 57539, 61940, 67070, 115078, 134140, 230156, 287695, 575390, 1093241, 1150780, 2186482, 4372964, 5466205, 10932410, 21864820]

約数ペア:

[(1, 21864820), (2, 10932410), (4, 5466205), (5, 4372964), (10, 2186482), (19, 1150780), (20, 1093241), (38, 575390), (76, 287695), (95, 230156), (163, 134140), (190, 115078), (326, 67070), (353, 61940), (380, 57539), (652, 33535), (706, 30970), (815, 26828), (1412, 15485), (1630, 13414), (1765, 12388), (3097, 7060), (3260, 6707), (3530, 6194)]