20248785

素因数分解:

$3^4\times 5^1\times {\mathrm{17}}^2\times {\mathrm{173}}^1$

素因数の和:224

約数の個数: 60

約数和(自身を含む): 38781468

約数和(自身を除く): 18532683

約数列:

[1, 3, 5, 9, 15, 17, 27, 45, 51, 81, 85, 135, 153, 173, 255, 289, 405, 459, 519, 765, 865, 867, 1377, 1445, 1557, 2295, 2595, 2601, 2941, 4335, 4671, 6885, 7785, 7803, 8823, 13005, 14013, 14705, 23355, 23409, 26469, 39015, 44115, 49997, 70065, 79407, 117045, 132345, 149991, 238221, 249985, 397035, 449973, 749955, 1191105, 1349919, 2249865, 4049757, 6749595, 20248785]

約数ペア:

[(1, 20248785), (3, 6749595), (5, 4049757), (9, 2249865), (15, 1349919), (17, 1191105), (27, 749955), (45, 449973), (51, 397035), (81, 249985), (85, 238221), (135, 149991), (153, 132345), (173, 117045), (255, 79407), (289, 70065), (405, 49997), (459, 44115), (519, 39015), (765, 26469), (865, 23409), (867, 23355), (1377, 14705), (1445, 14013), (1557, 13005), (2295, 8823), (2595, 7803), (2601, 7785), (2941, 6885), (4335, 4671)]