21694760

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{7639}}^1$

素因数の和:7721

約数の個数: 32

約数和(自身を含む): 49507200

約数和(自身を除く): 27812440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 7639, 15278, 30556, 38195, 61112, 76390, 152780, 305560, 542369, 1084738, 2169476, 2711845, 4338952, 5423690, 10847380, 21694760]

約数ペア:

[(1, 21694760), (2, 10847380), (4, 5423690), (5, 4338952), (8, 2711845), (10, 2169476), (20, 1084738), (40, 542369), (71, 305560), (142, 152780), (284, 76390), (355, 61112), (568, 38195), (710, 30556), (1420, 15278), (2840, 7639)]