157216520

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{64433}}^1$

素因数の和:64505

約数の個数: 32

約数和(自身を含む): 359541720

約数和(自身を除く): 202325200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 64433, 128866, 257732, 322165, 515464, 644330, 1288660, 2577320, 3930413, 7860826, 15721652, 19652065, 31443304, 39304130, 78608260, 157216520]

約数ペア:

[(1, 157216520), (2, 78608260), (4, 39304130), (5, 31443304), (8, 19652065), (10, 15721652), (20, 7860826), (40, 3930413), (61, 2577320), (122, 1288660), (244, 644330), (305, 515464), (488, 322165), (610, 257732), (1220, 128866), (2440, 64433)]