20945547

素因数分解:

$3^4\times 7^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1$

素因数の和:130

約数の個数: 80

約数和(自身を含む): 39517632

約数和(自身を除く): 18572085

約数列:

[1, 3, 7, 9, 17, 21, 27, 41, 51, 53, 63, 81, 119, 123, 153, 159, 189, 287, 357, 369, 371, 459, 477, 567, 697, 861, 901, 1071, 1107, 1113, 1377, 1431, 2091, 2173, 2583, 2703, 3213, 3321, 3339, 4293, 4879, 6273, 6307, 6519, 7749, 8109, 9639, 10017, 14637, 15211, 18819, 18921, 19557, 23247, 24327, 30051, 36941, 43911, 45633, 56457, 56763, 58671, 72981, 110823, 131733, 136899, 170289, 176013, 258587, 332469, 395199, 410697, 510867, 775761, 997407, 1232091, 2327283, 2992221, 6981849, 20945547]

約数ペア:

[(1, 20945547), (3, 6981849), (7, 2992221), (9, 2327283), (17, 1232091), (21, 997407), (27, 775761), (41, 510867), (51, 410697), (53, 395199), (63, 332469), (81, 258587), (119, 176013), (123, 170289), (153, 136899), (159, 131733), (189, 110823), (287, 72981), (357, 58671), (369, 56763), (371, 56457), (459, 45633), (477, 43911), (567, 36941), (697, 30051), (861, 24327), (901, 23247), (1071, 19557), (1107, 18921), (1113, 18819), (1377, 15211), (1431, 14637), (2091, 10017), (2173, 9639), (2583, 8109), (2703, 7749), (3213, 6519), (3321, 6307), (3339, 6273), (4293, 4879)]