81508070

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{397}}^1\times {\mathrm{419}}^1$

素因数の和:837

約数の個数: 48

約数和(自身を含む): 171506160

約数和(自身を除く): 89998090

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 397, 419, 490, 794, 838, 1985, 2095, 2779, 2933, 3970, 4190, 5558, 5866, 13895, 14665, 19453, 20531, 27790, 29330, 38906, 41062, 97265, 102655, 166343, 194530, 205310, 332686, 831715, 1164401, 1663430, 2328802, 5822005, 8150807, 11644010, 16301614, 40754035, 81508070]

約数ペア:

[(1, 81508070), (2, 40754035), (5, 16301614), (7, 11644010), (10, 8150807), (14, 5822005), (35, 2328802), (49, 1663430), (70, 1164401), (98, 831715), (245, 332686), (397, 205310), (419, 194530), (490, 166343), (794, 102655), (838, 97265), (1985, 41062), (2095, 38906), (2779, 29330), (2933, 27790), (3970, 20531), (4190, 19453), (5558, 14665), (5866, 13895)]