21208520

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31189}}^1$

素因数の和:31217

約数の個数: 32

約数和(自身を含む): 50527800

約数和(自身を除く): 29319280

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 31189, 62378, 124756, 155945, 249512, 311890, 530213, 623780, 1060426, 1247560, 2120852, 2651065, 4241704, 5302130, 10604260, 21208520]

約数ペア:

[(1, 21208520), (2, 10604260), (4, 5302130), (5, 4241704), (8, 2651065), (10, 2120852), (17, 1247560), (20, 1060426), (34, 623780), (40, 530213), (68, 311890), (85, 249512), (136, 155945), (170, 124756), (340, 62378), (680, 31189)]