20870577

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1499}}^1$

素因数の和:1542

約数の個数: 48

約数和(自身を含む): 39312000

約数和(自身を除く): 18441423

約数列:

[1, 3, 7, 9, 13, 17, 21, 39, 51, 63, 91, 117, 119, 153, 221, 273, 357, 663, 819, 1071, 1499, 1547, 1989, 4497, 4641, 10493, 13491, 13923, 19487, 25483, 31479, 58461, 76449, 94437, 136409, 175383, 178381, 229347, 331279, 409227, 535143, 993837, 1227681, 1605429, 2318953, 2981511, 6956859, 20870577]

約数ペア:

[(1, 20870577), (3, 6956859), (7, 2981511), (9, 2318953), (13, 1605429), (17, 1227681), (21, 993837), (39, 535143), (51, 409227), (63, 331279), (91, 229347), (117, 178381), (119, 175383), (153, 136409), (221, 94437), (273, 76449), (357, 58461), (663, 31479), (819, 25483), (1071, 19487), (1499, 13923), (1547, 13491), (1989, 10493), (4497, 4641)]