21986325

素因数分解:

$3^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{139}}^1$

素因数の和:211

約数の個数: 72

約数和(自身を含む): 42879200

約数和(自身を除く): 20892875

約数列:

[1, 3, 5, 9, 15, 19, 25, 37, 45, 57, 75, 95, 111, 139, 171, 185, 225, 285, 333, 417, 475, 555, 695, 703, 855, 925, 1251, 1425, 1665, 2085, 2109, 2641, 2775, 3475, 3515, 4275, 5143, 6255, 6327, 7923, 8325, 10425, 10545, 13205, 15429, 17575, 23769, 25715, 31275, 31635, 39615, 46287, 52725, 66025, 77145, 97717, 118845, 128575, 158175, 198075, 231435, 293151, 385725, 488585, 594225, 879453, 1157175, 1465755, 2442925, 4397265, 7328775, 21986325]

約数ペア:

[(1, 21986325), (3, 7328775), (5, 4397265), (9, 2442925), (15, 1465755), (19, 1157175), (25, 879453), (37, 594225), (45, 488585), (57, 385725), (75, 293151), (95, 231435), (111, 198075), (139, 158175), (171, 128575), (185, 118845), (225, 97717), (285, 77145), (333, 66025), (417, 52725), (475, 46287), (555, 39615), (695, 31635), (703, 31275), (855, 25715), (925, 23769), (1251, 17575), (1425, 15429), (1665, 13205), (2085, 10545), (2109, 10425), (2641, 8325), (2775, 7923), (3475, 6327), (3515, 6255), (4275, 5143)]