20856975916

素因数分解:

$2^2\times 7^1\times {\mathrm{67}}^1\times {\mathrm{89}}^1\times {\mathrm{124919}}^1$

素因数の和:125086

約数の個数: 48

約数和(自身を含む): 42812582400

約数和(自身を除く): 21955606484

約数列:

[1, 2, 4, 7, 14, 28, 67, 89, 134, 178, 268, 356, 469, 623, 938, 1246, 1876, 2492, 5963, 11926, 23852, 41741, 83482, 124919, 166964, 249838, 499676, 874433, 1748866, 3497732, 8369573, 11117791, 16739146, 22235582, 33478292, 44471164, 58587011, 77824537, 117174022, 155649074, 234348044, 311298148, 744891997, 1489783994, 2979567988, 5214243979, 10428487958, 20856975916]

約数ペア:

[(1, 20856975916), (2, 10428487958), (4, 5214243979), (7, 2979567988), (14, 1489783994), (28, 744891997), (67, 311298148), (89, 234348044), (134, 155649074), (178, 117174022), (268, 77824537), (356, 58587011), (469, 44471164), (623, 33478292), (938, 22235582), (1246, 16739146), (1876, 11117791), (2492, 8369573), (5963, 3497732), (11926, 1748866), (23852, 874433), (41741, 499676), (83482, 249838), (124919, 166964)]