21704325

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{587}}^1$

素因数の和:646

約数の個数: 48

約数和(自身を含む): 39372480

約数和(自身を除く): 17668155

約数列:

[1, 3, 5, 15, 17, 25, 29, 51, 75, 85, 87, 145, 255, 425, 435, 493, 587, 725, 1275, 1479, 1761, 2175, 2465, 2935, 7395, 8805, 9979, 12325, 14675, 17023, 29937, 36975, 44025, 49895, 51069, 85115, 149685, 249475, 255345, 289391, 425575, 748425, 868173, 1276725, 1446955, 4340865, 7234775, 21704325]

約数ペア:

[(1, 21704325), (3, 7234775), (5, 4340865), (15, 1446955), (17, 1276725), (25, 868173), (29, 748425), (51, 425575), (75, 289391), (85, 255345), (87, 249475), (145, 149685), (255, 85115), (425, 51069), (435, 49895), (493, 44025), (587, 36975), (725, 29937), (1275, 17023), (1479, 14675), (1761, 12325), (2175, 9979), (2465, 8805), (2935, 7395)]