21053080

素因数分解:

$2^3\times 5^1\times {\mathrm{163}}^1\times {\mathrm{3229}}^1$

素因数の和:3403

約数の個数: 32

約数和(自身を含む): 47674800

約数和(自身を除く): 26621720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 163, 326, 652, 815, 1304, 1630, 3229, 3260, 6458, 6520, 12916, 16145, 25832, 32290, 64580, 129160, 526327, 1052654, 2105308, 2631635, 4210616, 5263270, 10526540, 21053080]

約数ペア:

[(1, 21053080), (2, 10526540), (4, 5263270), (5, 4210616), (8, 2631635), (10, 2105308), (20, 1052654), (40, 526327), (163, 129160), (326, 64580), (652, 32290), (815, 25832), (1304, 16145), (1630, 12916), (3229, 6520), (3260, 6458)]