19784355

素因数分解:

$3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{157}}^1\times {\mathrm{271}}^1$

素因数の和:467

約数の個数: 32

約数和(自身を含む): 33005568

約数和(自身を除く): 13221213

約数列:

[1, 3, 5, 15, 31, 93, 155, 157, 271, 465, 471, 785, 813, 1355, 2355, 4065, 4867, 8401, 14601, 24335, 25203, 42005, 42547, 73005, 126015, 127641, 212735, 638205, 1318957, 3956871, 6594785, 19784355]

約数ペア:

[(1, 19784355), (3, 6594785), (5, 3956871), (15, 1318957), (31, 638205), (93, 212735), (155, 127641), (157, 126015), (271, 73005), (465, 42547), (471, 42005), (785, 25203), (813, 24335), (1355, 14601), (2355, 8401), (4065, 4867)]