21504065

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{211}}^1$

素因数の和:353

約数の個数: 32

約数和(自身を含む): 30222720

約数和(自身を除く): 8718655

約数列:

[1, 5, 11, 17, 55, 85, 109, 187, 211, 545, 935, 1055, 1199, 1853, 2321, 3587, 5995, 9265, 11605, 17935, 20383, 22999, 39457, 101915, 114995, 197285, 252989, 390983, 1264945, 1954915, 4300813, 21504065]

約数ペア:

[(1, 21504065), (5, 4300813), (11, 1954915), (17, 1264945), (55, 390983), (85, 252989), (109, 197285), (187, 114995), (211, 101915), (545, 39457), (935, 22999), (1055, 20383), (1199, 17935), (1853, 11605), (2321, 9265), (3587, 5995)]