21263229

素因数分解:

$3^5\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{127}}^1$

素因数の和:208

約数の個数: 48

約数和(自身を含む): 35223552

約数和(自身を除く): 13960323

約数列:

[1, 3, 9, 13, 27, 39, 53, 81, 117, 127, 159, 243, 351, 381, 477, 689, 1053, 1143, 1431, 1651, 2067, 3159, 3429, 4293, 4953, 6201, 6731, 10287, 12879, 14859, 18603, 20193, 30861, 44577, 55809, 60579, 87503, 133731, 167427, 181737, 262509, 401193, 545211, 787527, 1635633, 2362581, 7087743, 21263229]

約数ペア:

[(1, 21263229), (3, 7087743), (9, 2362581), (13, 1635633), (27, 787527), (39, 545211), (53, 401193), (81, 262509), (117, 181737), (127, 167427), (159, 133731), (243, 87503), (351, 60579), (381, 55809), (477, 44577), (689, 30861), (1053, 20193), (1143, 18603), (1431, 14859), (1651, 12879), (2067, 10287), (3159, 6731), (3429, 6201), (4293, 4953)]