19804040

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{15971}}^1$

素因数の和:16013

約数の個数: 32

約数和(自身を含む): 45999360

約数和(自身を除く): 26195320

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 15971, 31942, 63884, 79855, 127768, 159710, 319420, 495101, 638840, 990202, 1980404, 2475505, 3960808, 4951010, 9902020, 19804040]

約数ペア:

[(1, 19804040), (2, 9902020), (4, 4951010), (5, 3960808), (8, 2475505), (10, 1980404), (20, 990202), (31, 638840), (40, 495101), (62, 319420), (124, 159710), (155, 127768), (248, 79855), (310, 63884), (620, 31942), (1240, 15971)]