20821325

素因数分解:

$5^2\times 7^2\times {\mathrm{23}}^1\times {\mathrm{739}}^1$

素因数の和:786

約数の個数: 36

約数和(自身を含む): 31381920

約数和(自身を除く): 10560595

約数列:

[1, 5, 7, 23, 25, 35, 49, 115, 161, 175, 245, 575, 739, 805, 1127, 1225, 3695, 4025, 5173, 5635, 16997, 18475, 25865, 28175, 36211, 84985, 118979, 129325, 181055, 424925, 594895, 832853, 905275, 2974475, 4164265, 20821325]

約数ペア:

[(1, 20821325), (5, 4164265), (7, 2974475), (23, 905275), (25, 832853), (35, 594895), (49, 424925), (115, 181055), (161, 129325), (175, 118979), (245, 84985), (575, 36211), (739, 28175), (805, 25865), (1127, 18475), (1225, 16997), (3695, 5635), (4025, 5173)]