21558579

素因数分解:

$3^1\times 7^4\times {\mathrm{41}}^1\times {\mathrm{73}}^1$

素因数の和:145

約数の個数: 40

約数和(自身を含む): 34822032

約数和(自身を除く): 13263453

約数列:

[1, 3, 7, 21, 41, 49, 73, 123, 147, 219, 287, 343, 511, 861, 1029, 1533, 2009, 2401, 2993, 3577, 6027, 7203, 8979, 10731, 14063, 20951, 25039, 42189, 62853, 75117, 98441, 146657, 175273, 295323, 439971, 525819, 1026599, 3079797, 7186193, 21558579]

約数ペア:

[(1, 21558579), (3, 7186193), (7, 3079797), (21, 1026599), (41, 525819), (49, 439971), (73, 295323), (123, 175273), (147, 146657), (219, 98441), (287, 75117), (343, 62853), (511, 42189), (861, 25039), (1029, 20951), (1533, 14063), (2009, 10731), (2401, 8979), (2993, 7203), (3577, 6027)]