168708920

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{69143}}^1$

素因数の和:69215

約数の個数: 32

約数和(自身を含む): 385823520

約数和(自身を除く): 217114600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 69143, 138286, 276572, 345715, 553144, 691430, 1382860, 2765720, 4217723, 8435446, 16870892, 21088615, 33741784, 42177230, 84354460, 168708920]

約数ペア:

[(1, 168708920), (2, 84354460), (4, 42177230), (5, 33741784), (8, 21088615), (10, 16870892), (20, 8435446), (40, 4217723), (61, 2765720), (122, 1382860), (244, 691430), (305, 553144), (488, 345715), (610, 276572), (1220, 138286), (2440, 69143)]