19919955

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{181}}^1$

素因数の和:252

約数の個数: 64

約数和(自身を含む): 37739520

約数和(自身を除く): 17819565

約数列:

[1, 3, 5, 11, 15, 23, 29, 33, 55, 69, 87, 115, 145, 165, 181, 253, 319, 345, 435, 543, 667, 759, 905, 957, 1265, 1595, 1991, 2001, 2715, 3335, 3795, 4163, 4785, 5249, 5973, 7337, 9955, 10005, 12489, 15747, 20815, 22011, 26245, 29865, 36685, 45793, 57739, 62445, 78735, 110055, 120727, 137379, 173217, 228965, 288695, 362181, 603635, 686895, 866085, 1327997, 1810905, 3983991, 6639985, 19919955]

約数ペア:

[(1, 19919955), (3, 6639985), (5, 3983991), (11, 1810905), (15, 1327997), (23, 866085), (29, 686895), (33, 603635), (55, 362181), (69, 288695), (87, 228965), (115, 173217), (145, 137379), (165, 120727), (181, 110055), (253, 78735), (319, 62445), (345, 57739), (435, 45793), (543, 36685), (667, 29865), (759, 26245), (905, 22011), (957, 20815), (1265, 15747), (1595, 12489), (1991, 10005), (2001, 9955), (2715, 7337), (3335, 5973), (3795, 5249), (4163, 4785)]