20801984

素因数分解:

$2^6\times 7^1\times {\mathrm{59}}^1\times {\mathrm{787}}^1$

素因数の和:865

約数の個数: 56

約数和(自身を含む): 48036480

約数和(自身を除く): 27234496

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 59, 64, 112, 118, 224, 236, 413, 448, 472, 787, 826, 944, 1574, 1652, 1888, 3148, 3304, 3776, 5509, 6296, 6608, 11018, 12592, 13216, 22036, 25184, 26432, 44072, 46433, 50368, 88144, 92866, 176288, 185732, 325031, 352576, 371464, 650062, 742928, 1300124, 1485856, 2600248, 2971712, 5200496, 10400992, 20801984]

約数ペア:

[(1, 20801984), (2, 10400992), (4, 5200496), (7, 2971712), (8, 2600248), (14, 1485856), (16, 1300124), (28, 742928), (32, 650062), (56, 371464), (59, 352576), (64, 325031), (112, 185732), (118, 176288), (224, 92866), (236, 88144), (413, 50368), (448, 46433), (472, 44072), (787, 26432), (826, 25184), (944, 22036), (1574, 13216), (1652, 12592), (1888, 11018), (3148, 6608), (3304, 6296), (3776, 5509)]