20145970

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{4999}}^1$

素因数の和:5050

約数の個数: 32

約数和(自身を含む): 40320000

約数和(自身を除く): 20174030

約数列:

[1, 2, 5, 10, 13, 26, 31, 62, 65, 130, 155, 310, 403, 806, 2015, 4030, 4999, 9998, 24995, 49990, 64987, 129974, 154969, 309938, 324935, 649870, 774845, 1549690, 2014597, 4029194, 10072985, 20145970]

約数ペア:

[(1, 20145970), (2, 10072985), (5, 4029194), (10, 2014597), (13, 1549690), (26, 774845), (31, 649870), (62, 324935), (65, 309938), (130, 154969), (155, 129974), (310, 64987), (403, 49990), (806, 24995), (2015, 9998), (4030, 4999)]