21545595

素因数分解:

$3^6\times 5^1\times {\mathrm{23}}^1\times {\mathrm{257}}^1$

素因数の和:303

約数の個数: 56

約数和(自身を含む): 40607136

約数和(自身を除く): 19061541

約数列:

[1, 3, 5, 9, 15, 23, 27, 45, 69, 81, 115, 135, 207, 243, 257, 345, 405, 621, 729, 771, 1035, 1215, 1285, 1863, 2313, 3105, 3645, 3855, 5589, 5911, 6939, 9315, 11565, 16767, 17733, 20817, 27945, 29555, 34695, 53199, 62451, 83835, 88665, 104085, 159597, 187353, 265995, 312255, 478791, 797985, 936765, 1436373, 2393955, 4309119, 7181865, 21545595]

約数ペア:

[(1, 21545595), (3, 7181865), (5, 4309119), (9, 2393955), (15, 1436373), (23, 936765), (27, 797985), (45, 478791), (69, 312255), (81, 265995), (115, 187353), (135, 159597), (207, 104085), (243, 88665), (257, 83835), (345, 62451), (405, 53199), (621, 34695), (729, 29555), (771, 27945), (1035, 20817), (1215, 17733), (1285, 16767), (1863, 11565), (2313, 9315), (3105, 6939), (3645, 5911), (3855, 5589)]