19913745

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{197}}^1\times {\mathrm{293}}^1$

素因数の和:521

約数の個数: 32

約数和(自身を含む): 33530112

約数和(自身を除く): 13616367

約数列:

[1, 3, 5, 15, 23, 69, 115, 197, 293, 345, 591, 879, 985, 1465, 2955, 4395, 4531, 6739, 13593, 20217, 22655, 33695, 57721, 67965, 101085, 173163, 288605, 865815, 1327583, 3982749, 6637915, 19913745]

約数ペア:

[(1, 19913745), (3, 6637915), (5, 3982749), (15, 1327583), (23, 865815), (69, 288605), (115, 173163), (197, 101085), (293, 67965), (345, 57721), (591, 33695), (879, 22655), (985, 20217), (1465, 13593), (2955, 6739), (4395, 4531)]