19904140

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{107}}^1\times {\mathrm{131}}^1$

素因数の和:318

約数の個数: 48

約数和(自身を含む): 43110144

約数和(自身を除く): 23206004

約数列:

[1, 2, 4, 5, 10, 20, 71, 107, 131, 142, 214, 262, 284, 355, 428, 524, 535, 655, 710, 1070, 1310, 1420, 2140, 2620, 7597, 9301, 14017, 15194, 18602, 28034, 30388, 37204, 37985, 46505, 56068, 70085, 75970, 93010, 140170, 151940, 186020, 280340, 995207, 1990414, 3980828, 4976035, 9952070, 19904140]

約数ペア:

[(1, 19904140), (2, 9952070), (4, 4976035), (5, 3980828), (10, 1990414), (20, 995207), (71, 280340), (107, 186020), (131, 151940), (142, 140170), (214, 93010), (262, 75970), (284, 70085), (355, 56068), (428, 46505), (524, 37985), (535, 37204), (655, 30388), (710, 28034), (1070, 18602), (1310, 15194), (1420, 14017), (2140, 9301), (2620, 7597)]