20279175

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{19}}^2\times {\mathrm{107}}^1$

素因数の和:165

約数の個数: 72

約数和(自身を含む): 40818816

約数和(自身を除く): 20539641

約数列:

[1, 3, 5, 7, 15, 19, 21, 25, 35, 57, 75, 95, 105, 107, 133, 175, 285, 321, 361, 399, 475, 525, 535, 665, 749, 1083, 1425, 1605, 1805, 1995, 2033, 2247, 2527, 2675, 3325, 3745, 5415, 6099, 7581, 8025, 9025, 9975, 10165, 11235, 12635, 14231, 18725, 27075, 30495, 37905, 38627, 42693, 50825, 56175, 63175, 71155, 115881, 152475, 189525, 193135, 213465, 270389, 355775, 579405, 811167, 965675, 1067325, 1351945, 2897025, 4055835, 6759725, 20279175]

約数ペア:

[(1, 20279175), (3, 6759725), (5, 4055835), (7, 2897025), (15, 1351945), (19, 1067325), (21, 965675), (25, 811167), (35, 579405), (57, 355775), (75, 270389), (95, 213465), (105, 193135), (107, 189525), (133, 152475), (175, 115881), (285, 71155), (321, 63175), (361, 56175), (399, 50825), (475, 42693), (525, 38627), (535, 37905), (665, 30495), (749, 27075), (1083, 18725), (1425, 14231), (1605, 12635), (1805, 11235), (1995, 10165), (2033, 9975), (2247, 9025), (2527, 8025), (2675, 7581), (3325, 6099), (3745, 5415)]