21343665

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{409}}^1$

素因数の和:502

約数の個数: 48

約数和(自身を含む): 40383360

約数和(自身を除く): 19039695

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 71, 105, 147, 213, 245, 355, 409, 497, 735, 1065, 1227, 1491, 2045, 2485, 2863, 3479, 6135, 7455, 8589, 10437, 14315, 17395, 20041, 29039, 42945, 52185, 60123, 87117, 100205, 145195, 203273, 300615, 435585, 609819, 1016365, 1422911, 3049095, 4268733, 7114555, 21343665]

約数ペア:

[(1, 21343665), (3, 7114555), (5, 4268733), (7, 3049095), (15, 1422911), (21, 1016365), (35, 609819), (49, 435585), (71, 300615), (105, 203273), (147, 145195), (213, 100205), (245, 87117), (355, 60123), (409, 52185), (497, 42945), (735, 29039), (1065, 20041), (1227, 17395), (1491, 14315), (2045, 10437), (2485, 8589), (2863, 7455), (3479, 6135)]