19720575

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{659}}^1$

素因数の和:701

約数の個数: 72

約数和(自身を含む): 42556800

約数和(自身を除く): 22836225

約数列:

[1, 3, 5, 7, 9, 15, 19, 21, 25, 35, 45, 57, 63, 75, 95, 105, 133, 171, 175, 225, 285, 315, 399, 475, 525, 659, 665, 855, 1197, 1425, 1575, 1977, 1995, 3295, 3325, 4275, 4613, 5931, 5985, 9885, 9975, 12521, 13839, 16475, 23065, 29655, 29925, 37563, 41517, 49425, 62605, 69195, 87647, 112689, 115325, 148275, 187815, 207585, 262941, 313025, 345975, 438235, 563445, 788823, 939075, 1037925, 1314705, 2191175, 2817225, 3944115, 6573525, 19720575]

約数ペア:

[(1, 19720575), (3, 6573525), (5, 3944115), (7, 2817225), (9, 2191175), (15, 1314705), (19, 1037925), (21, 939075), (25, 788823), (35, 563445), (45, 438235), (57, 345975), (63, 313025), (75, 262941), (95, 207585), (105, 187815), (133, 148275), (171, 115325), (175, 112689), (225, 87647), (285, 69195), (315, 62605), (399, 49425), (475, 41517), (525, 37563), (659, 29925), (665, 29655), (855, 23065), (1197, 16475), (1425, 13839), (1575, 12521), (1977, 9975), (1995, 9885), (3295, 5985), (3325, 5931), (4275, 4613)]