21088840

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31013}}^1$

素因数の和:31041

約数の個数: 32

約数和(自身を含む): 50242680

約数和(自身を除く): 29153840

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 31013, 62026, 124052, 155065, 248104, 310130, 527221, 620260, 1054442, 1240520, 2108884, 2636105, 4217768, 5272210, 10544420, 21088840]

約数ペア:

[(1, 21088840), (2, 10544420), (4, 5272210), (5, 4217768), (8, 2636105), (10, 2108884), (17, 1240520), (20, 1054442), (34, 620260), (40, 527221), (68, 310130), (85, 248104), (136, 155065), (170, 124052), (340, 62026), (680, 31013)]