21669975

素因数分解:

$3^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{137}}^1$

素因数の和:209

約数の個数: 72

約数和(自身を含む): 42266640

約数和(自身を除く): 20596665

約数列:

[1, 3, 5, 9, 15, 19, 25, 37, 45, 57, 75, 95, 111, 137, 171, 185, 225, 285, 333, 411, 475, 555, 685, 703, 855, 925, 1233, 1425, 1665, 2055, 2109, 2603, 2775, 3425, 3515, 4275, 5069, 6165, 6327, 7809, 8325, 10275, 10545, 13015, 15207, 17575, 23427, 25345, 30825, 31635, 39045, 45621, 52725, 65075, 76035, 96311, 117135, 126725, 158175, 195225, 228105, 288933, 380175, 481555, 585675, 866799, 1140525, 1444665, 2407775, 4333995, 7223325, 21669975]

約数ペア:

[(1, 21669975), (3, 7223325), (5, 4333995), (9, 2407775), (15, 1444665), (19, 1140525), (25, 866799), (37, 585675), (45, 481555), (57, 380175), (75, 288933), (95, 228105), (111, 195225), (137, 158175), (171, 126725), (185, 117135), (225, 96311), (285, 76035), (333, 65075), (411, 52725), (475, 45621), (555, 39045), (685, 31635), (703, 30825), (855, 25345), (925, 23427), (1233, 17575), (1425, 15207), (1665, 13015), (2055, 10545), (2109, 10275), (2603, 8325), (2775, 7809), (3425, 6327), (3515, 6165), (4275, 5069)]