156719720

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1\times {\mathrm{397}}^1$

素因数の和:618

約数の個数: 64

約数和(自身を含む): 361065600

約数和(自身を除く): 204345880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 139, 142, 278, 284, 355, 397, 556, 568, 695, 710, 794, 1112, 1390, 1420, 1588, 1985, 2780, 2840, 3176, 3970, 5560, 7940, 9869, 15880, 19738, 28187, 39476, 49345, 55183, 56374, 78952, 98690, 110366, 112748, 140935, 197380, 220732, 225496, 275915, 281870, 394760, 441464, 551830, 563740, 1103660, 1127480, 2207320, 3917993, 7835986, 15671972, 19589965, 31343944, 39179930, 78359860, 156719720]

約数ペア:

[(1, 156719720), (2, 78359860), (4, 39179930), (5, 31343944), (8, 19589965), (10, 15671972), (20, 7835986), (40, 3917993), (71, 2207320), (139, 1127480), (142, 1103660), (278, 563740), (284, 551830), (355, 441464), (397, 394760), (556, 281870), (568, 275915), (695, 225496), (710, 220732), (794, 197380), (1112, 140935), (1390, 112748), (1420, 110366), (1588, 98690), (1985, 78952), (2780, 56374), (2840, 55183), (3176, 49345), (3970, 39476), (5560, 28187), (7940, 19738), (9869, 15880)]