20404515

素因数分解:

$3^1\times 5^1\times {\mathrm{67}}^1\times {\mathrm{79}}^1\times {\mathrm{257}}^1$

素因数の和:411

約数の個数: 32

約数和(自身を含む): 33684480

約数和(自身を除く): 13279965

約数列:

[1, 3, 5, 15, 67, 79, 201, 237, 257, 335, 395, 771, 1005, 1185, 1285, 3855, 5293, 15879, 17219, 20303, 26465, 51657, 60909, 79395, 86095, 101515, 258285, 304545, 1360301, 4080903, 6801505, 20404515]

約数ペア:

[(1, 20404515), (3, 6801505), (5, 4080903), (15, 1360301), (67, 304545), (79, 258285), (201, 101515), (237, 86095), (257, 79395), (335, 60909), (395, 51657), (771, 26465), (1005, 20303), (1185, 17219), (1285, 15879), (3855, 5293)]