19955680

素因数分解:

$2^5\times 5^1\times {\mathrm{191}}^1\times {\mathrm{653}}^1$

素因数の和:859

約数の個数: 48

約数和(自身を含む): 47464704

約数和(自身を除く): 27509024

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 191, 382, 653, 764, 955, 1306, 1528, 1910, 2612, 3056, 3265, 3820, 5224, 6112, 6530, 7640, 10448, 13060, 15280, 20896, 26120, 30560, 52240, 104480, 124723, 249446, 498892, 623615, 997784, 1247230, 1995568, 2494460, 3991136, 4988920, 9977840, 19955680]

約数ペア:

[(1, 19955680), (2, 9977840), (4, 4988920), (5, 3991136), (8, 2494460), (10, 1995568), (16, 1247230), (20, 997784), (32, 623615), (40, 498892), (80, 249446), (160, 124723), (191, 104480), (382, 52240), (653, 30560), (764, 26120), (955, 20896), (1306, 15280), (1528, 13060), (1910, 10448), (2612, 7640), (3056, 6530), (3265, 6112), (3820, 5224)]