19697680

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{12959}}^1$

素因数の和:12991

約数の個数: 40

約数和(自身を含む): 48211200

約数和(自身を除く): 28513520

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 12959, 25918, 51836, 64795, 103672, 129590, 207344, 246221, 259180, 492442, 518360, 984884, 1036720, 1231105, 1969768, 2462210, 3939536, 4924420, 9848840, 19697680]

約数ペア:

[(1, 19697680), (2, 9848840), (4, 4924420), (5, 3939536), (8, 2462210), (10, 1969768), (16, 1231105), (19, 1036720), (20, 984884), (38, 518360), (40, 492442), (76, 259180), (80, 246221), (95, 207344), (152, 129590), (190, 103672), (304, 64795), (380, 51836), (760, 25918), (1520, 12959)]