19877800

素因数分解:

$2^3\times 5^2\times {\mathrm{19}}^1\times {\mathrm{5231}}^1$

素因数の和:5266

約数の個数: 48

約数和(自身を含む): 48657600

約数和(自身を除く): 28779800

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 25, 38, 40, 50, 76, 95, 100, 152, 190, 200, 380, 475, 760, 950, 1900, 3800, 5231, 10462, 20924, 26155, 41848, 52310, 99389, 104620, 130775, 198778, 209240, 261550, 397556, 496945, 523100, 795112, 993890, 1046200, 1987780, 2484725, 3975560, 4969450, 9938900, 19877800]

約数ペア:

[(1, 19877800), (2, 9938900), (4, 4969450), (5, 3975560), (8, 2484725), (10, 1987780), (19, 1046200), (20, 993890), (25, 795112), (38, 523100), (40, 496945), (50, 397556), (76, 261550), (95, 209240), (100, 198778), (152, 130775), (190, 104620), (200, 99389), (380, 52310), (475, 41848), (760, 26155), (950, 20924), (1900, 10462), (3800, 5231)]