20462780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{211}}^1\times {\mathrm{373}}^1$

素因数の和:606

約数の個数: 48

約数和(自身を含む): 46621344

約数和(自身を除く): 26158564

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 211, 260, 373, 422, 746, 844, 1055, 1492, 1865, 2110, 2743, 3730, 4220, 4849, 5486, 7460, 9698, 10972, 13715, 19396, 24245, 27430, 48490, 54860, 78703, 96980, 157406, 314812, 393515, 787030, 1023139, 1574060, 2046278, 4092556, 5115695, 10231390, 20462780]

約数ペア:

[(1, 20462780), (2, 10231390), (4, 5115695), (5, 4092556), (10, 2046278), (13, 1574060), (20, 1023139), (26, 787030), (52, 393515), (65, 314812), (130, 157406), (211, 96980), (260, 78703), (373, 54860), (422, 48490), (746, 27430), (844, 24245), (1055, 19396), (1492, 13715), (1865, 10972), (2110, 9698), (2743, 7460), (3730, 5486), (4220, 4849)]