20591505

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{2447}}^1$

素因数の和:2486

約数の個数: 48

約数和(自身を含む): 41243904

約数和(自身を除く): 20652399

約数列:

[1, 3, 5, 9, 11, 15, 17, 33, 45, 51, 55, 85, 99, 153, 165, 187, 255, 495, 561, 765, 935, 1683, 2447, 2805, 7341, 8415, 12235, 22023, 26917, 36705, 41599, 80751, 110115, 124797, 134585, 207995, 242253, 374391, 403755, 457589, 623985, 1211265, 1372767, 1871955, 2287945, 4118301, 6863835, 20591505]

約数ペア:

[(1, 20591505), (3, 6863835), (5, 4118301), (9, 2287945), (11, 1871955), (15, 1372767), (17, 1211265), (33, 623985), (45, 457589), (51, 403755), (55, 374391), (85, 242253), (99, 207995), (153, 134585), (165, 124797), (187, 110115), (255, 80751), (495, 41599), (561, 36705), (765, 26917), (935, 22023), (1683, 12235), (2447, 8415), (2805, 7341)]