20751675

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{29}}^2\times {\mathrm{47}}^1$

素因数の和:125

約数の個数: 72

約数和(自身を含む): 41473536

約数和(自身を除く): 20721861

約数列:

[1, 3, 5, 7, 15, 21, 25, 29, 35, 47, 75, 87, 105, 141, 145, 175, 203, 235, 329, 435, 525, 609, 705, 725, 841, 987, 1015, 1175, 1363, 1645, 2175, 2523, 3045, 3525, 4089, 4205, 4935, 5075, 5887, 6815, 8225, 9541, 12615, 15225, 17661, 20445, 21025, 24675, 28623, 29435, 34075, 39527, 47705, 63075, 88305, 102225, 118581, 143115, 147175, 197635, 238525, 276689, 441525, 592905, 715575, 830067, 988175, 1383445, 2964525, 4150335, 6917225, 20751675]

約数ペア:

[(1, 20751675), (3, 6917225), (5, 4150335), (7, 2964525), (15, 1383445), (21, 988175), (25, 830067), (29, 715575), (35, 592905), (47, 441525), (75, 276689), (87, 238525), (105, 197635), (141, 147175), (145, 143115), (175, 118581), (203, 102225), (235, 88305), (329, 63075), (435, 47705), (525, 39527), (609, 34075), (705, 29435), (725, 28623), (841, 24675), (987, 21025), (1015, 20445), (1175, 17661), (1363, 15225), (1645, 12615), (2175, 9541), (2523, 8225), (3045, 6815), (3525, 5887), (4089, 5075), (4205, 4935)]