21512660

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{853}}^1$

素因数の和:972

約数の個数: 48

約数和(自身を含む): 49210896

約数和(自身を除く): 27698236

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 97, 130, 194, 260, 388, 485, 853, 970, 1261, 1706, 1940, 2522, 3412, 4265, 5044, 6305, 8530, 11089, 12610, 17060, 22178, 25220, 44356, 55445, 82741, 110890, 165482, 221780, 330964, 413705, 827410, 1075633, 1654820, 2151266, 4302532, 5378165, 10756330, 21512660]

約数ペア:

[(1, 21512660), (2, 10756330), (4, 5378165), (5, 4302532), (10, 2151266), (13, 1654820), (20, 1075633), (26, 827410), (52, 413705), (65, 330964), (97, 221780), (130, 165482), (194, 110890), (260, 82741), (388, 55445), (485, 44356), (853, 25220), (970, 22178), (1261, 17060), (1706, 12610), (1940, 11089), (2522, 8530), (3412, 6305), (4265, 5044)]