21390070

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{4447}}^1$

素因数の和:4504

約数の個数: 32

約数和(自身を含む): 42594048

約数和(自身を除く): 21203978

約数列:

[1, 2, 5, 10, 13, 26, 37, 65, 74, 130, 185, 370, 481, 962, 2405, 4447, 4810, 8894, 22235, 44470, 57811, 115622, 164539, 289055, 329078, 578110, 822695, 1645390, 2139007, 4278014, 10695035, 21390070]

約数ペア:

[(1, 21390070), (2, 10695035), (5, 4278014), (10, 2139007), (13, 1645390), (26, 822695), (37, 578110), (65, 329078), (74, 289055), (130, 164539), (185, 115622), (370, 57811), (481, 44470), (962, 22235), (2405, 8894), (4447, 4810)]