19808680

素因数分解:

$2^3\times 5^1\times {\mathrm{211}}^1\times {\mathrm{2347}}^1$

素因数の和:2569

約数の個数: 32

約数和(自身を含む): 44799840

約数和(自身を除く): 24991160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 211, 422, 844, 1055, 1688, 2110, 2347, 4220, 4694, 8440, 9388, 11735, 18776, 23470, 46940, 93880, 495217, 990434, 1980868, 2476085, 3961736, 4952170, 9904340, 19808680]

約数ペア:

[(1, 19808680), (2, 9904340), (4, 4952170), (5, 3961736), (8, 2476085), (10, 1980868), (20, 990434), (40, 495217), (211, 93880), (422, 46940), (844, 23470), (1055, 18776), (1688, 11735), (2110, 9388), (2347, 8440), (4220, 4694)]