20145496420

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{239}}^1\times {\mathrm{86011}}^1$

素因数の和:86273

約数の個数: 72

約数和(自身を含む): 49419054720

約数和(自身を除く): 29273558300

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 239, 245, 478, 490, 956, 980, 1195, 1673, 2390, 3346, 4780, 6692, 8365, 11711, 16730, 23422, 33460, 46844, 58555, 86011, 117110, 172022, 234220, 344044, 430055, 602077, 860110, 1204154, 1720220, 2408308, 3010385, 4214539, 6020770, 8429078, 12041540, 16858156, 20556629, 21072695, 41113258, 42145390, 82226516, 84290780, 102783145, 143896403, 205566290, 287792806, 411132580, 575585612, 719482015, 1007274821, 1438964030, 2014549642, 2877928060, 4029099284, 5036374105, 10072748210, 20145496420]

約数ペア:

[(1, 20145496420), (2, 10072748210), (4, 5036374105), (5, 4029099284), (7, 2877928060), (10, 2014549642), (14, 1438964030), (20, 1007274821), (28, 719482015), (35, 575585612), (49, 411132580), (70, 287792806), (98, 205566290), (140, 143896403), (196, 102783145), (239, 84290780), (245, 82226516), (478, 42145390), (490, 41113258), (956, 21072695), (980, 20556629), (1195, 16858156), (1673, 12041540), (2390, 8429078), (3346, 6020770), (4780, 4214539), (6692, 3010385), (8365, 2408308), (11711, 1720220), (16730, 1204154), (23422, 860110), (33460, 602077), (46844, 430055), (58555, 344044), (86011, 234220), (117110, 172022)]