21398325

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1291}}^1$

素因数の和:1334

約数の個数: 48

約数和(自身を含む): 40372416

約数和(自身を除く): 18974091

約数列:

[1, 3, 5, 13, 15, 17, 25, 39, 51, 65, 75, 85, 195, 221, 255, 325, 425, 663, 975, 1105, 1275, 1291, 3315, 3873, 5525, 6455, 16575, 16783, 19365, 21947, 32275, 50349, 65841, 83915, 96825, 109735, 251745, 285311, 329205, 419575, 548675, 855933, 1258725, 1426555, 1646025, 4279665, 7132775, 21398325]

約数ペア:

[(1, 21398325), (3, 7132775), (5, 4279665), (13, 1646025), (15, 1426555), (17, 1258725), (25, 855933), (39, 548675), (51, 419575), (65, 329205), (75, 285311), (85, 251745), (195, 109735), (221, 96825), (255, 83915), (325, 65841), (425, 50349), (663, 32275), (975, 21947), (1105, 19365), (1275, 16783), (1291, 16575), (3315, 6455), (3873, 5525)]