21604518

素因数分解:

$2^1\times 3^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{5431}}^1$

素因数の和:5469

約数の個数: 48

約数和(自身を含む): 53385696

約数和(自身を除く): 31781178

約数列:

[1, 2, 3, 6, 9, 13, 17, 18, 26, 34, 39, 51, 78, 102, 117, 153, 221, 234, 306, 442, 663, 1326, 1989, 3978, 5431, 10862, 16293, 32586, 48879, 70603, 92327, 97758, 141206, 184654, 211809, 276981, 423618, 553962, 635427, 830943, 1200251, 1270854, 1661886, 2400502, 3600753, 7201506, 10802259, 21604518]

約数ペア:

[(1, 21604518), (2, 10802259), (3, 7201506), (6, 3600753), (9, 2400502), (13, 1661886), (17, 1270854), (18, 1200251), (26, 830943), (34, 635427), (39, 553962), (51, 423618), (78, 276981), (102, 211809), (117, 184654), (153, 141206), (221, 97758), (234, 92327), (306, 70603), (442, 48879), (663, 32586), (1326, 16293), (1989, 10862), (3978, 5431)]