21675525

素因数分解:

$3^1\times 5^2\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{107}}^1$

素因数の和:230

約数の個数: 48

約数和(自身を含む): 37658304

約数和(自身を除く): 15982779

約数列:

[1, 3, 5, 15, 25, 37, 73, 75, 107, 111, 185, 219, 321, 365, 535, 555, 925, 1095, 1605, 1825, 2675, 2701, 2775, 3959, 5475, 7811, 8025, 8103, 11877, 13505, 19795, 23433, 39055, 40515, 59385, 67525, 98975, 117165, 195275, 202575, 289007, 296925, 585825, 867021, 1445035, 4335105, 7225175, 21675525]

約数ペア:

[(1, 21675525), (3, 7225175), (5, 4335105), (15, 1445035), (25, 867021), (37, 585825), (73, 296925), (75, 289007), (107, 202575), (111, 195275), (185, 117165), (219, 98975), (321, 67525), (365, 59385), (535, 40515), (555, 39055), (925, 23433), (1095, 19795), (1605, 13505), (1825, 11877), (2675, 8103), (2701, 8025), (2775, 7811), (3959, 5475)]