21816525

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{241}}^1$

素因数の和:342

約数の個数: 48

約数和(自身を含む): 38890368

約数和(自身を除く): 17073843

約数列:

[1, 3, 5, 15, 17, 25, 51, 71, 75, 85, 213, 241, 255, 355, 425, 723, 1065, 1205, 1207, 1275, 1775, 3615, 3621, 4097, 5325, 6025, 6035, 12291, 17111, 18075, 18105, 20485, 30175, 51333, 61455, 85555, 90525, 102425, 256665, 290887, 307275, 427775, 872661, 1283325, 1454435, 4363305, 7272175, 21816525]

約数ペア:

[(1, 21816525), (3, 7272175), (5, 4363305), (15, 1454435), (17, 1283325), (25, 872661), (51, 427775), (71, 307275), (75, 290887), (85, 256665), (213, 102425), (241, 90525), (255, 85555), (355, 61455), (425, 51333), (723, 30175), (1065, 20485), (1205, 18105), (1207, 18075), (1275, 17111), (1775, 12291), (3615, 6035), (3621, 6025), (4097, 5325)]